Iscsi latency what is high

This more of a false positive alert? I would open a support case, need to verify that Delayed ACK is actually disabled. The BP doc, says to uncheck and reboot. What I've been seeing is that's not always effective. Any NEW volumes get that valule, but all the existing ones, stored in a local DB still have it enabled. Only way for sure to fix it, is put node in maint mode. Remove discovery address for EQL array s.

When it comes back up, re-add the discovery address. Check that the DelayedACK checkbox is clear. THEN rescan the adapter. That's only sure fire way to know that DelayedACK isn't enabled. That's the signature of delayedACK being in effect. However, seeing those messages occasionally is not much of concern. That should remain very low. Browse Community. Turn on suggestions. Forum Rules. Log in. Install the app. Register Now! Register for the iXsystems Community to get an ad-free experience and exclusive discounts in our eBay Store.

JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter Jimmy Tran Start date Mar 13, Status Not open for further replies.

Jimmy Tran Member. Joined Dec 27, Messages I checked the reports from FreeNAS and everything checked out. I went into vCenter to take a look at the datastore and noticed I would get latency from 25msms. I use to have my VM's setup on a 4 x 4TB Mirrored and it worked really well other than I ran out of space due to my carelessness with the amount of VM"s on that datastore and snapshots running too often. I have now went back to this setup and carefully planned out what VM's will be living on this datastore.

Only time will tell how this will hold up. Question: Everything was running fine on raidz2 until I brought up 3 more VM's. Once I shut those VM's off, the latency was still there. Is that an expected behavior? Would a reboot have fixed that issue?

Mirfster Doesn't know what he's talking about. Joined Oct 2, Messages 3, Jimmy Tran said:. But to do so you need to configure local port as well. More details here. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment.

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United States English. Ask a question. Quick access. Search related threads. Remove From My Forums. Asked by:. Archived Forums. File Services and Storage. Sign in to vote. I am currently running the latest version of starwinds free iscsi server. I have connected it to a HP 10Gb port which is also connected via 10Gb to our vmware servers. I have a dedicated vlan just for iscsi and have enabled jumbo frames on the vlan.

I frequently see very high latency on my iscsi storage. So much so that it can timeout or hang vmware.