To check if this is the problem: Disable Storage System syncron mirroring (I saw some systems that perform not well beacues of firmware bugs) Update your SAN/iSCSI/NAS Firmware (in case of VMware snapshot commit/delete VMware writes a large amount of random writes) I saw a lot of old firmwares that have problems with that.ĭo you use Disk System based sync mirroring? ISCSI Datastores => Install latest VMware Versions and check your HBA/datastore access profile if it suites your SAN Storage (Dedicated/Rounrobin/.) + Use a dedicated enterprise switch for iSCSI VMware traffic SAN Datastores => Install latest VMware Versions and check your HBA/datastore access profile if it suites your SAN Storage (Dedicated/Rounrobin/.) NFS Datastores => Install VMware fixes (symtom: snapshot freezes at snapshot delete) With snapshot freeze with DAG cluster pans
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