Le service de performance vSAN

Je me doute bien que vous n’allez pas dévorer cet article de la première à la dernière ligne. Je l’ai plutôt écrit dans l’idée d’en faire un document de référence pour qui souhaiterait comprendre et exploiter les statistiques disponibles pour un cluster vSAN. Vous allez y trouver des explications concernant le mode de fonctionnement du service Performance ainsi que la liste exhaustive des métriques que l’on peut obtenir pour un cluster vSAN 6.7.

Sans maîtrise, la performance n’est rien

Le service de performance est comme vous l’aurez sûrement deviné en charge de collecter les différentes statistiques. Cela concerne tous les éléments qui peuvent entrer en compte dans le fonctionnement de l’infrastructure vSAN. Cela inclut bien sûr les VM, disques et diskgroups mais aussi les vmkernel et cartes réseaux utilisés pour faire transiter les données liées au stockage.

Le service est présent sur chacun des serveurs ESXi qui composent le cluster vSAN. Un de ces serveurs va avoir pour rôle de centraliser les données envoyées par ses petits camarades, de les moyenner sur une période de 5 minutes puis de les stocker directement sur le datastore vSAN. De ce fait, il va être possible (et obligatoire) d’appliquer une politique de stockage pour, par exemple, répliquer les données sur un ou plusieurs hôtes.

Les données sont conservées 90 jours. Passé ce délai, elles sont écrasées par des informations plus récentes. Dans le cas où vous souhaitez avoir une rétention plus longue il vous faut utiliser des produits comme VMware vROps ou bien DC Scope d’Easyvirt (nos chouchous sur ce blog…). Une autre solution consiste à construire vous-même votre infrastructure de monitoring comme a pu le présenter Cédric sur son blog en utilisant des applications open source telles que Telegraf, InfluxDB, Graphana et vsanmetrics [Teaser]plus d’infos à venir dans un prochain article ![/Teaser].

Vous pouvez visualiser les métriques directement depuis l’interface graphique du vCenter ou encore les extraire via les API vSAN.

Frontend ou backend ? Telle est la question…

En explorant les différents tableaux, vous allez voir apparaître des notions de frontend (ou client) et backend. Prenons le cas d’une VM pour bien différencier les deux concepts. Une machine virtuelle va consommer des ressources vSAN, elle est donc considérée comme un client frontend. Si jamais elle utilise une politique de stockage avec un FTT=1 et qu’elle génère 100 IOPS en écriture, elle va réellement générer 200 IOPS sur le stockage backend (diskgroups / disques) du fait de l’écriture synchrone.

Il n’y a pas que les VM qui sont considérées comme des clients vSAN, le service performance et iSCSI entrent aussi dans cette catégorie. En ce qui concerne le backend, sont prises en compte les VM, les services Performance et iSCSI mais aussi les opérations de réplication et synchronisation.

Comment obtenir ces informations ?

A ma connaissance, la liste des différentes métriques n’est pas disponible dans la documentation de l’API. Vous pouvez par contre consulter ce kb qui liste les statistiques visibles dans le vCenter. Pour trouver une liste exhaustive il est nécessaire de scripter un peu pour extraire les infos directement en interrogeant un cluster vSAN via les API.

Le script que j’ai développé et utilisé pour générer les tableaux ci-dessous est disponible sur GitHub. Il est écrit en Python. Si vous souhaitez l’utiliser et que vous découvrez le monde merveilleux de ce langage de programmation dans un environnement VMware vSAN, je vous conseille de lire cet article qui devrait vous permettre de gagner un peu de temps pour préparer votre poste de travail.

Liste des différentes entités

Pour une fois, l’organisation est relativement simple (oui c’est vous que je regarde mes chères baies Unity…). Les métriques sont regroupées par type d’entité. Par exemple vous allez trouver le type ‘virtual-machine’ qui regroupe toutes les statistiques liées à l’utilisation du cluster vSAN du point de vue d’une VM donnée.

Name	Description
cluster-domclient	Metrics about clusters in the perspective of VM consumption.
cluster-domcompmgr	Metrics about clusters in the perspective of vSAN backend.
host-domclient	Metrics about hosts in the perspective of VM consumption
host-domcompmgr	Metrics about hosts in the perspective of vSAN backend.
cache-disk	Metrics about Cache-tier disks
capacity-disk	Metrics about Capacity-tier disks
disk-group	Metrics about disk groups.
vscsi	Metrics for Virtual SCSI of virtual machines
virtual-machine	Metrics for virtual machines
virtual-disk	Metrics for virtual disks.
vsan-vnic-net	Metrics for vSAN VMkernel Network Adapter.
vsan-host-net	Metrics for vSAN Host Network.
vsan-pnic-net	Metrics for vSAN physical NIC.
vsan-iscsi-host	Metrics for all vSAN iSCSI targets on this ESXi host.
vsan-iscsi-target	Metrics for all LUNs on a vSAN iSCSI target.
vsan-iscsi-lun	Metrics for a vSAN iSCSI LUN.

Liste détaillée des différentes métriques

Au sein de chaque groupe d’entités, les métriques sont classées par label. Un label correspond à une mesure précise comme par exemple le nombre d’IO par seconde en écriture pour un disque donné. Vous trouverez la liste exhaustive des métriques triées par entité ci-dessous.

cluster-domclient

Metrics about clusters in the perspective of VM consumption.

Label	Name	Unit	Description
iopsRead	Read IOPS	number	Read IOPS consumed by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
iopsWrite	Write IOPS	number	Write IOPS consumed by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
throughputRead	Read Throughput	rate_bytes	Read Throughput consumed by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
throughputWrite	Write Throughput	rate_bytes	Write Throughput consumed by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
latencyAvgRead	Read Latency	time_ms	Average read latency of IOs generated by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
latencyAvgWrite	Write Latency	time_ms	Average write latency of IOs generated by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
congestion	Congestions	number	Congestions of IOs generated by all vSAN clients in the cluster, such as virtual machines, stats object, etc.
oio	Outstanding IO	number	Outstanding IO from all vSAN clients in the cluster, such as virtual machines, stats object, etc.

cluster-domcompmgr

Metrics about clusters in the perspective of vSAN backend.

Label	Name	Unit	Description
iopsRead	Read IOPS	number	vSAN cluster read IOPS in the perspective of vSAN backend.
iopsResyncRead	Resync Read IOPS	number	vSAN cluster read IOPS of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.
iopsWrite	Write IOPS	number	vSAN cluster write IOPS in the perspective of vSAN backend.
iopsRecWrite	Recovery Write IOPS	number	vSAN cluster recovery write IOPS in the perspective of vSAN backend.
throughputRead	Read Throughput	rate_bytes	vSAN cluster read throughput in the perspective of vSAN backend.
tputResyncRead	Resync Read Throughput	rate_bytes	vSAN cluster read throughput of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.
throughputWrite	Write Throughput	rate_bytes	vSAN cluster write throughput in the perspective of vSAN backend.
throughputRecWrite	Recovery Write Throughput	rate_bytes	vSAN cluster recovery write throughput in the perspective of vSAN backend.
latencyAvgRead	Read Latency	time_ms	vSAN cluster average read latency in the perspective of vSAN backend.
latAvgResyncRead	Resync Read Latency	time_ms	vSAN cluster read average latency of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.
latencyAvgWrite	Write Latency	time_ms	vSAN cluster average write latency in the perspective of vSAN backend.
latencyAvgRecWrite	Recovery Write Latency	time_ms	vSAN cluster recovery write average latency in the perspective of vSAN backend.
congestion	Congestions	number	vSAN cluster congestions in the perspective of vSAN backend
oio	Outstanding IO	number	vSAN cluster outstanding IO in the perspective of vSAN backend

host-domclient

Metrics about hosts in the perspective of VM consumption

Label	Name	Unit	Description
iopsRead	Read IOPS	number	Read IOPS consumed by all vSAN clients in the host, such as virtual machines, stats object, etc.
iopsWrite	Write IOPS	number	Write IOPS consumed by all vSAN clients in the host, such as virtual machines, stats object, etc.
throughputRead	Read Throughput	rate_bytes	Read Throughput consumed by all vSAN clients in the host, such as virtual machines, stats object, etc.
throughputWrite	Write Throughput	rate_bytes	Write Throughput consumed by all vSAN clients in the host, such as virtual machines, stats object, etc.
latencyAvgRead	Read Latency	time_ms	Average read latency of IOs generated by all vSAN clients in the host, such as virtual machines, stats object, etc.
latencyAvgWrite	Write Latency	time_ms	Average write latency of IOs generated by all vSAN clients in the host, such as virtual machines, stats object, etc.
clientCacheHits	Local Client Cache Hit IOPS	number	Average local client cache read IOPS.
clientCacheHitRate	Local Client Cache Hit Rate	percentage	Percentage of read IOs which could be satisfied by the local client cache.
congestion	Congestions	number	Congestions of IOs generated by all vSAN clients in the host, such as virtual machines, stats object, etc.
oio	Outstanding IO	number	Outstanding IO from all vSAN clients in the host, such as virtual machines, stats object, etc.

host-domcompmgr

Metrics about hosts in the perspective of vSAN backend.

Label	Name	Unit	Description
iopsRead	Read IOPS	number	vSAN host read IOPS in the perspective of vSAN backend.
iopsWrite	Write IOPS	number	vSAN host write IOPS in the perspective of vSAN backend.
throughputRead	Read Throughput	rate_bytes	vSAN host read throughput in the perspective of vSAN backend.
throughputWrite	Write Throughput	rate_bytes	vSAN host write throughput in the perspective of vSAN backend.
latencyAvgRead	Read Latency	time_ms	vSAN host read IO average latency in the perspective of vSAN backend.
latencyAvgWrite	Write Latency	time_ms	vSAN host write IO average latency in the perspective of vSAN backend.
iopsResyncRead	Resync Read IOPS	number	vSAN host read IOPS of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.
iopsRecWrite	Recovery Write IOPS	number	vSAN host recovery write IOPS in the perspective of vSAN backend.
tputResyncRead	Resync Read Throughput	rate_bytes	vSAN host read throughput of resync traffic includes policy change, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.
throughputRecWrite	Recovery Write Throughput	rate_bytes	vSAN host recovery write throughput in the perspective of vSAN backend.
latAvgResyncRead	Resync Read Latency	time_ms	vSAN host read average latency of resync traffic includes policy chane, repair, maintenance mode / evacuation and rebalance from resyncing objects in the perspective of vSAN backend.
latencyAvgRecWrite	Recovery Write Latency	time_ms	vSAN host recovery write IO average latency in the perspective of vSAN backend.
congestion	Congestions	number	vSAN host Congestions in the perspective of vSAN backend.
oio	Outstanding IO	number	vSAN host Outstanding IO in the perspective of vSAN backend.

cache-disk

Metrics about Cache-tier disks

Label	Name	Unit	Description
iopsDevRead	Physical-layer Read IOPS	number	vSAN disk physical/firmware layer read IOPS.
iopsDevWrite	Physical-layer Write IOPS	number	vSAN disk physical/firmware layer write IOPS.
throughputDevRead	Physical-layer Read Throughput	rate_bytes	vSAN disk physical/firmware layer read throughput.
throughputDevWrite	Physical-layer Write Throughput	rate_bytes	vSAN disk physical/firmware layer write throughput.
latencyDevRead	Physical-layer Read Latency	time_ms	vSAN disk physical/firmware layer read latency.
latencyDevWrite	Physical-layer Write Latency	time_ms	vSAN disk physical/firmware layer write latency.
latencyDevGAvg	Guest Average Latency	time_ms	vSAN disk Guest IO latency (total latency).
latencyDevDAvg	Device Average Latency	time_ms	vSAN disk IO device latency (from HBA to backend storage).

capacity-disk

Metrics about Capacity-tier disks

Label	Name	Unit	Description
iopsDevRead	Physical-layer Read IOPS	number	vSAN disk physical/firmware layer read IOPS.
iopsDevWrite	Physical-layer Write IOPS	number	vSAN disk physical/firmware layer write IOPS.
throughputDevRead	Physical-layer Read Throughput	rate_bytes	vSAN disk physical/firmware layer read throughput.
throughputDevWrite	Physical-layer Write Throughput	rate_bytes	vSAN disk physical/firmware layer write throughput.
latencyDevRead	Physical-layer Read Latency	time_ms	vSAN disk physical/firmware layer read latency.
latencyDevWrite	Physical-layer Write Latency	time_ms	vSAN disk physical/firmware layer write latency.
latencyDevGAvg	Guest Average Latency	time_ms	vSAN disk Guest IO latency (total latency).
latencyDevDAvg	Device Average Latency	time_ms	vSAN disk IO device latency (from HBA to backend storage).
iopsRead	vSAN Layer Read IOPS	number	Disk vSAN layer read IOPS.
iopsWrite	vSAN Layer Write IOPS	number	Disk vSAN layer write IOPS.
latencyRead	vSAN Layer Read Latency	time_ms	Disk vSAN layer read latency.
latencyWrite	vSAN Layer Write Latency	time_ms	Disk vSAN layer write latency.

disk-group

Metrics about disk groups.

Label	Name	Unit	Description
iopsRead	Frontend Read IOPS	number	vSAN disk group (cache tier disk) frontend read IOPS including RC read misses.
iopsWrite	Frontend Write IOPS	number	vSAN disk group (cache tier disk) frontend write IOPS.
iopsRcRead	Read Cache Read IOPS	number	vSAN disk group (cache tier disk) Read Cache read IOPS.
iopsWbWrite	Write Buffer Write IOPS	number	vSAN disk group (cache tier disk) Write Buffer write IOPS.
throughputRead	Frontend Read Throughput	rate_bytes	vSAN disk group (cache tier disk) frontend read throughput.
throughputWrite	Frontend Write Throughput	rate_bytes	vSAN disk group (cache tier disk) frontend write throughput.
latencyAvgRead	Frontend Read Latency	time_ms	vSAN disk group (cache tier disk) frontend read latency.
latencyAvgWrite	Frontend Write Latency	time_ms	vSAN disk group (cache tier disk) frontend write latency.
latencyRcRead	Read Cache Read Latency	time_ms	vSAN disk group (cache tier disk) Read Cache read latency.
latencyWbWrite	Write Buffer Write Latency	time_ms	vSAN disk group (cache tier disk) Write Buffer write latency.
iopsRcWrite	Read Cache Write IOPS	number	vSAN disk group (cache tier disk) Read Cache write IOPS.
iopsWbRead	Write Buffer Read IOPS	number	vSAN disk group (cache tier disk) Write Buffer read IOPS.
latencyRcWrite	Read Cache Write Latency	time_ms	vSAN disk group (cache tier disk) Read Cache write latency.
latencyWbRead	Write Buffer Read Latency	time_ms	vSAN disk group (cache tier disk) Write Buffer read latency.
rcHitRate	Read Cache Hit Rate	percentage	vSAN disk group (cache tier disk) Read Cache Hit Rate.
warEvictions	Cache Invalidations	number	Cache lines invalidated due to overwrites.
quotaEvictions	Evictions	number	Evictions due to Read Cache contention.
wbFreePct	Write Buffer Free Percentage	percentage	vSAN disk group (cache tier disk) Write Buffer free percentage.
capacity	Capacity	size_bytes	vSAN disk group capacity.
capacityUsed	Used Capacity	size_bytes	vSAN disk group used capacity.
capacityReserved	Reserved Capacity	size_bytes	vSAN disk group reserved capacity.
rcSize	Read Cache Size	size_bytes	vSAN disk group Read Cache size.
wbSize	Write Buffer Size	size_bytes	vSAN disk group Write Buffer size.
ssdBytesDrained	Bytes De-stage from SSD	rate_bytes	The throughput of the SSD bytes de-staged from the cache disk to capacity disks
zeroBytesDrained	Zero-Bytes De-stage	rate_bytes	The throughput of the zero-bytes de-staged to capacity disks
memCongestion	Mem-Congestion	number	vSAN disk group Mem-congestions.
slabCongestion	Slab-Congestion	number	vSAN disk group Slab-congestions.
ssdCongestion	SSD-Congestion	number	vSAN disk group SSD-congestions.
iopsCongestion	IOPS-Congestion	number	vSAN disk group IOPS-congestions.
logCongestion	Log-Congestion	number	vSAN disk group Log-congestions.
compCongestion	Comp-Congestion	number	vSAN disk group Comp-congestion.
oioWrite	Outstanding Write OPs	number	The number of outstanding write operations of the disk group
oioRecWrite	Outstanding Recovery Write OPs	number	The number of outstanding recovery write operations of the disk group
oioWriteSize	Outstanding Write IO Size	size_bytes	The size of outstanding write IO of the disk group
oioRecWriteSize	Outstanding Recovery Write IO Size	size_bytes	The size of outstanding recovery write IO of the disk group
iopsDelayPctSched	Delayed IO Percentage	percentage	The percentage of IOs which go though vSAN internal queues.
latencyDelaySched	Delayed IO Average Latency	time_ms	The average latency of total IOs which go though vSAN internal queues.
latencySchedQueueNS	Latency of Namespace Queue	time_ms	The Latency of the namespace IO queue in the vSAN internal scheduler.
latencySchedQueueRec	Latency of Recovery Queue	time_ms	The Latency of the recovery IO queue in the vSAN internal scheduler.
latencySchedQueueVM	Latency of VM Queue	time_ms	The Latency of the VM IO queue in the vSAN internal scheduler.
latencySchedQueueMeta	Latency of Meta Queue	time_ms	The Latency of the meta IO queue in the vSAN internal scheduler.
iopsSched	Total Delayed IOPS	number	The IOPS of total IOs which go through vSAN internal queues.
iopsSchedQueueNS	IOPS of Namespace Queue	number	The IOPS of the namespace IO queue in the vSAN internal scheduler.
iopsSchedQueueRec	IOPS of Recovery Queue	number	The IOPS of the recovery IO queue in the vSAN internal scheduler.
iopsSchedQueueVM	IOPS of VM Queue	number	The IOPS of the VM IO queue in the vSAN internal scheduler.
iopsSchedQueueMeta	IOPS of Meta Queue	number	The IOPS of the meta IO queue in the vSAN internal scheduler.
throughputSched	Total Queue Throughput	rate_bytes	The throughput of total delayed IO in the vSAN internal scheduler.
throughputSchedQueueNS	Throughput of Namespace Queue	rate_bytes	The throughput of the namespace IO queue in the vSAN internal scheduler.
throughputSchedQueueRec	Throughput of Recovery Queue	rate_bytes	The throughput of the recovery IO queue in the vSAN internal scheduler.
throughputSchedQueueVM	Throughput of VM Queue	rate_bytes	The throughput of the VM IO queue in the vSAN internal scheduler.
throughputSchedQueueMeta	Throughput of Meta Queue	rate_bytes	The throughput of the meta IO queue in the vSAN internal scheduler.
iopsResyncReadPolicy	Policy Change Read	number	vSAN disk group level read IOPS for resync traffic caused by change of policy.
iopsResyncReadDecom	Evacuation Read	number	vSAN disk group level read IOPS for resync traffic caused by maintenance mode and object evacuation.
iopsResyncReadRebalance	Rebalance Read	number	vSAN disk group level read IOPS for resync traffic caused by rebalancing objects.
iopsResyncReadFixComp	Repair Read	number	vSAN disk group level read IOPS for resync traffic caused by object repair.
iopsResyncWritePolicy	Policy Change Write	number	vSAN disk group level write IOPS for resync traffic caused by change of policy.
iopsResyncWriteDecom	Evacuation Write	number	vSAN disk group level write IOPS for resync traffic caused by maintenance mode and object evacuation.
iopsResyncWriteRebalance	Rebalance Write	number	vSAN disk group level write IOPS for resync traffic caused by rebalancing objects.
iopsResyncWriteFixComp	Repair Write	number	vSAN disk group level write IOPS for resync traffic caused by object repair.
tputResyncReadPolicy	Policy Change Read	rate_bytes	vSAN disk group level read throughput for resync traffic caused by change of policy.
tputResyncReadDecom	Evacuation Read	rate_bytes	vSAN disk group level read throughput for resync traffic caused by maintenance mode and object evacuation.
tputResyncReadRebalance	Rebalance Read	rate_bytes	vSAN disk group level read throughput for resync traffic caused by rebalancing objects.
tputResyncReadFixComp	Repair Read	rate_bytes	vSAN disk group level read throughput for resync traffic caused by object repair.
tputResyncWritePolicy	Policy Change Write	rate_bytes	vSAN disk group level write throughput for resync traffic caused by change of policy.
tputResyncWriteDecom	Decommission Write	rate_bytes	vSAN disk group level write throughput for resync traffic caused by maintenance mode and object evacuation.
tputResyncWriteRebalance	Rebalance Write	rate_bytes	vSAN disk group level write throughput for resync traffic caused by rebalancing objects.
tputResyncWriteFixComp	Repair Write	rate_bytes	vSAN disk group level write throughput for resync traffic caused by object repair.
latResyncReadPolicy	Policy Change Read	time_ms	vSAN disk group level read latency for resync traffic caused by change of policy.
latResyncReadDecom	Evacuation Read	time_ms	vSAN disk group level read latency for resync traffic caused by maintenance mode and object evacuation.
latResyncReadRebalance	Rebalance Read	time_ms	vSAN disk group level read latency for resync traffic caused by rebalancing objects.
latResyncReadFixComp	Repair Read	time_ms	vSAN disk group level read latency for resync traffic caused by object repair.
latResyncWritePolicy	Policy Change Write	time_ms	vSAN disk group level write latency for resync traffic caused by change of policy.
latResyncWriteDecom	Evacuation Write	time_ms	vSAN disk group level write latency for resync traffic caused by maintenance mode and object evacuation.
latResyncWriteRebalance	Rebalance Write	time_ms	vSAN disk group level write latency for resync traffic caused by rebalancing objects.
latResyncWriteFixComp	Repair Write	time_ms	vSAN disk group level write latency for resync traffic caused by object repair.

vscsi

Metrics for Virtual SCSI of virtual machines

Label	Name	Unit	Description
iopsRead	Read IOPS	number	Virtual machine VSCSI read IOPS.
iopsWrite	Write IOPS	number	Virtual machine VSCSI write IOPS.
throughputRead	Read Throughput	rate_bytes	Virtual machine VSCSI read throughput.
throughputWrite	Write Throughput	rate_bytes	Virtual machine VSCSI write throughput.
latencyRead	Read Latency	time_ms	Virtual machine VSCSI read latency.
latencyWrite	Write Latency	time_ms	Virtual machine VSCSI write latency.

virtual-machine

Metrics for virtual machines

Label	Name	Unit	Description
iopsRead	Read IOPS	number	Virtual machine read IOPS.
iopsWrite	Write IOPS	number	Virtual machine write IOPS.
throughputRead	Read Throughput	rate_bytes	Virtual machine read throughput.
throughputWrite	Write Throughput	rate_bytes	Virtual machine write throughput.
latencyRead	Read Latency	time_ms	Virtual machine read latency.
latencyWrite	Write Latency	time_ms	Virtual machine write latency.

virtual-disk

Metrics for virtual disks.

Label	Name	Unit	Description
iopsLimit	Normalized IOPS Limit	number	The applied IOPS limit.
NIOPS	Normalized IOPS	number	This shows IOPS that are represented using a weighted size of 32KB by default. This means that a 64KB read or write operation represents 2 normalized IO. The weighted size is a configurable parameter.
NIOPSDelayed	Delayed Normalized IOPS	number	This is the IOPS for normalized IOs that are delayed.

vsan-vnic-net

Metrics for vSAN VMkernel Network Adapter.

Label	Name	Unit	Description
rxThroughput	Throughput Inbound	rate_bytes	VMkernel Network Adapter Throughput Inbound.
txThroughput	Throughput Outbound	rate_bytes	VMkernel Network Adapter Throughput Outbound.
rxPackets	Inbound Packets Per Second	number	VMkernel Network Adapter Inbound Packets Per Second.
txPackets	Outbound Packets Per Second	number	VMkernel Network Adapter Outbound Packets Per Second.
rxPacketsLossRate	Inbound Packets Loss Rate	permille	Percentage of VMkernel Network Adapter Inbound Packets Loss Rate.
txPacketsLossRate	Outbound Packets Loss Rate	permille	Percentage of VMkernel Network Adapter Outbound Packets Loss Rate.

vsan-host-net

Metrics for vSAN Host Network.

Label	Name	Unit	Description
rxThroughput	Network Inbound Throughput	rate_bytes	Host Throughput Inbound of All VMkernel Network Adapters Enabled vSAN Traffic.
txThroughput	Network Outbound Throughput	rate_bytes	Host Throughput Outbound of All VMkernel Network Adapters Enabled vSAN Traffic.
rxPackets	Network Inbound Packets Per Second	number	Host Network Inbound Packets Per Second of All VMkernel Network Adapters Enabled vSAN Traffic.
txPackets	Network Outbound Packets Per Second	number	Host Network Outbound Packets Per Second of All VMkernel Network Adapters Enabled vSAN Traffic.
rxPacketsLossRate	Network Inbound Packets Loss Rate	permille	Percentage of Host Inbound Packets Loss Rate of All VMkernel Network Adapters Enabled vSAN Traffic.
txPacketsLossRate	Network Outbound Packets Loss Rate	permille	Percentage of Host Outbound Packets Loss Rate of All VMkernel Network Adapters Enabled vSAN Traffic.

vsan-pnic-net

Metrics for vSAN physical NIC.

Label	Name	Unit	Description
rxThroughput	pNIC Throughput Inbound	rate_bytes	Physical NIC Throughput Inbound.
txThroughput	pNIC Throughput Outbound	rate_bytes	Physical NIC Throughput Outbound.
rxPackets	pNIC Inbound Packets Per Second	number	Physical NIC Inbound Packets Per Second.
txPackets	pNIC Outbound Packets Per Second	number	Physical NIC Outbound Packets Per Second.
rxPacketsLossRate	pNIC Inbound Packets Loss Rate	permille	Percentage of Physical NIC Inbound Packets Loss Rate.
txPacketsLossRate	pNIC Outbound Packets Loss Rate	permille	Percentage of Physical NIC Outbound Packets Loss Rate.

vsan-iscsi-host

Metrics for all vSAN iSCSI targets on this ESXi host.

Label	Name	Unit	Description
iopsRead	Read IOPS	number	Read IOPS consumed by all vSAN iSCSI targets on this ESXi host.
iopsWrite	Write IOPS	number	Write IOPS consumed by all vSAN iSCSI targets on this ESXi host.
iopsTotal	Total IOPS	number	Total IOPS consumed by all vSAN iSCSI targets on this ESXi host.
bandwidthRead	Read Bandwidth	rate_bytes	Read bandwidth consumed by all vSAN iSCSI targets on this ESXi host.
bandwidthWrite	Write Bandwidth	rate_bytes	Write bandwidth consumed by all vSAN iSCSI targets on this ESXi host.
bandwidthTotal	Total Bandwidth	rate_bytes	Total bandwidth consumed by all vSAN iSCSI targets on this ESXi host.
latencyRead	Read Latency	time_ms	Average read latency of IOs generated by all vSAN iSCSI targets on this ESXi host.
latencyWrite	Write Latency	time_ms	Average write latency of IOs generated by all vSAN iSCSI targets on this ESXi host.
latencyTotal	Total Latency	time_ms	Average total latency of IOs generated by all vSAN iSCSI targets on this ESXi host.
queueDepth	Outstanding IO	number	Outstanding IO from all vSAN iSCSI targets on this ESXi host.

vsan-iscsi-target

Metrics for all LUNs on a vSAN iSCSI target.

Label	Name	Unit	Description
iopsRead	Read IOPS	number	Read IOPS consumed by all vSAN iSCSI LUNs on this target.
iopsWrite	Write IOPS	number	Write IOPS consumed by all vSAN iSCSI LUNs on this target.
iopsTotal	Total IOPS	number	Total IOPS consumed by all vSAN iSCSI LUNs on this target.
bandwidthRead	Read Bandwidth	rate_bytes	Read bandwidth consumed by all vSAN iSCSI LUNs on this target.
bandwidthWrite	Write Bandwidth	rate_bytes	Write bandwidth consumed by all vSAN iSCSI LUNs on this target.
bandwidthTotal	Total Bandwidth	rate_bytes	Total bandwidth consumed by all vSAN iSCSI LUNs on this target.
latencyRead	Read Latency	time_ms	Average read latency of IOs generated by all vSAN iSCSI LUNs on this target.
latencyWrite	Write Latency	time_ms	Average write latency of IOs generated by all vSAN iSCSI LUNs on this target.
latencyTotal	Total Latency	time_ms	Average total latency of IOs generated by all vSAN iSCSI LUNs on this target.
queueDepth	Outstanding IO	number	Outstanding IO from all vSAN iSCSI LUNs on this target.

vsan-iscsi-lun

Metrics for a vSAN iSCSI LUN.

Label	Name	Unit	Description
iopsRead	Read IOPS	number	Read IOPS consumed by this vSAN iSCSI LUN.
iopsWrite	Write IOPS	number	Write IOPS consumed by this vSAN iSCSI LUN.
iopsTotal	Total IOPS	number	Total IOPS consumed by this vSAN iSCSI LUN.
bandwidthRead	Read Bandwidth	rate_bytes	Read bandwidth consumed by this vSAN iSCSI LUN.
bandwidthWrite	Write Bandwidth	rate_bytes	Write bandwidth consumed by this vSAN iSCSI LUN.
bandwidthTotal	Total Bandwidth	rate_bytes	Total bandwidth consumed by this vSAN iSCSI LUN.
latencyRead	Read Latency	time_ms	Average read latency of IOs generated by this vSAN iSCSI LUN.
latencyWrite	Write Latency	time_ms	Average write latency of IOs generated by this vSAN iSCSI LUN.
latencyTotal	Total Latency	time_ms	Average total latency of IOs generated by this vSAN iSCSI LUN.
queueDepth	Outstanding IO	number	Outstanding IO from this vSAN iSCSI LUN.