Equallogic san hq office 360 issues
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I followed advice from this post as well as following all the usual best practice guides. We see 50MB/s in total from the Equallogic regardless of how many hosts are used and how many NICs, if we test from two hosts the speed halves, if we test from two NICS we see 25MB/s on each NIC or 50MB/s if one NIC is tested., I know its been a while but I found this while trying to diagnose a fault of our own.
EQUALLOGIC SAN HQ OFFICE 360 ISSUES HOW TO
This thread has some specifc instructions on how to disable DelayedACK as well. Each VM can have up to four Virtual SCSI adapters.Ħ.) iSCSI switch not configured correctly or not designed for iSCSI SAN use. Should be 3.ĥ.) VMs with more than one VMDK (or RDM) are sharing one Virtual SCSI adapter. I just posted this to another thread on EQL perf issues:Ĭommon causes of performance issues that generate that alert are:Ģ.) Large Recieve Offload (LRO) is enabledĤ.) MPIO is set to VMware Round Robin but the IOs per path is left at default of 1000. (disable) I find that, while in maint mode, removing the discovery address and any discovered targets (in static discovery tab), then disabling Delayed ACK and re-add in Discovery Address and rescan resolves this.Īt the ESX console run: #vmkiscsid -dump-db | grep Delayed All the entries should end with ='0' for disabled. If you just change it, it appears that only new LUNs will inherit the value. One thing about Delayed ACK, is that you have to verify that the change took place. If you google "multivendor iscsi post" you will find it on several blogs.
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One of the was to change the IOs per path from 1000 to 3. Dell/EQL, HP, EMC, VMware, etc agreed on some general principles about iSCSI configuration.