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ChrisMiles

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Everything posted by ChrisMiles

  1. ChrisMiles
    Why, do they have it built in or something?
  2. ChrisMiles
    But for this purpose, the switch will be stand alone, not connected to the network in any way, just switching a secondary cluster network between 5 hosts so I won't be able to manage it or connect it to any kind of controller or server. Can they work like that?
  3. ChrisMiles
    Ah right so you get sucked into a subscription based software model, I guess thats how they can do the hardware so cheap.
  4. ChrisMiles
    Thank you, thats very helpful. I've heard of Ubiquiti Networks but never used them.
  5. ChrisMiles
    I need to procure a switch with at least 5 SFP+ ports to run a stand alone cluster network but can't seem to find anything that's not super expensive (£4k+). All our switches are HPE/Aruba but we don't have to stick with that for this. Any recommendations would be appreciated.
  6. ChrisMiles
    Can you try compatibility mode? Also start looking for a replacement...
  7. ChrisMiles
    If you're doing file level backups you shouldn't need to back up the ChunkStore folder anyway though. The act of reading a file has nothing to do with dedupe, that all happens in the background. The size on disk is irrelevant. Not sure exactly what your setup is but I'd strongly recommend switching to block level storage backups when using dedupe. It preserves the deduplication and is much safer. You start messing about a deduped volume and you're going to have a very bad day one day.
  8. ChrisMiles
    Definitely recommend adding IP addresses of the devices, any vlans or routes as well as subnet info the corner somewhere.
  9. ChrisMiles
    You end up with two very delicate, very demanding eggs in one basket and gain, what, 1 row on your cluster gui. Honestly have to be nuts to even consider this unless paying retail for windows/sql licenses.
  10. ChrisMiles
    Vault will purge data from user accounts that falls outside the configured retention period. So if you set it to 1 year, emails older than this will be removed from your whole domain. See about retention here: https://support.google.com/vault/answer/2990828?hl=en
  11. ChrisMiles
    Deleted emails in the vault are kept for 25 days unless covered by a retention or hold so if your mail retention is set to forever then it should stay in the vault for forever.
  12. ChrisMiles
    Perhaps you could use powershell to automate auto-deletion of events added less than 48 hours in advance (using creation date and event date to work it out), with an automatic email to the creator telling them why. That way you could also exempt certain people such as the tech himself.
  13. ChrisMiles
    You're not using that weird parallel iscsi port sharing crap that broadcom nics sometimes have are you?
  14. ChrisMiles
    Try this one also: netsh int tcp set global autotuning=disabled IIRC this is actually the main problem one, so try this first. Requires a reboot. https://www.dell.com/support/article/us/en/04/sln132130/windows-server-disabling-tcp-chimney-offloading-and-autotuning-may-improve-iscsi-performance?lang=en Don't worry about the Hyper-V vs Cluster manager thing, all cluster manager does is ensure hosts have the same settings and if this wasn't the case it would have shown on the cluster report. That does make me think of something though, the iscsi networks should show in cluster manager and should be set to not be used by the cluster at all. They should not have cluster comms enabled. Also, on your iscsi network adapters did you disable all the adapter bindings except TCPIP4? And NetBIOS over TCP/IP.
  15. ChrisMiles
    Couple of things to try here: https://www.dell.com/community/PowerVault/Very-slow-READ-performance-with-MD3200i/td-p/3577960/page/2 Including disabling RSS and TCp Chiney Offload on the host nics (I think youre meant to do this anyway for iscsi) and disabling flow control.
  16. ChrisMiles
    Well that looks normal. I have to admit I'm running out of ideas! Any chance your fast out-of-cluster tests are just a result of IO caching on the host and or SAN? You could try running some random IO tests. 22 MB/s is not very fast at all though.I was reading the details of your lab. What setup did you go with for the disk config in the SAN in the end? 7.2k sata disks are not going to do much in the way of iops and if you chose raid 5 or even 6 it may be that simply the san controller is too slow to cope. I am just guessing now though.
  17. ChrisMiles
    Hmmmmm OK, when its clustered is the host you are doing the copy from the owner of the disk? Also check for redirected access mode anyway by running Get-ClusterSharedVolumeState on the cluster node. Post the result if you want.
  18. ChrisMiles
    Try the single cables thing first and if that doesn't help maybe try turning off jumbo frames, the performance gain is tiny to nil anyway. I assumed you enabled it on the SAN, switches and hosts?
  19. ChrisMiles
    One other thing - I know that even some older enterprise switches (HP at least) can't do jumbo frames and flow control at the same time so if you've enabled these perhaps they might be causing issues.
  20. ChrisMiles
    That doesn't look wrong necessarily, but some iSCSI SANs can be really weird. The first thing I would do is disconnect from the switch all but the VLAN 130 cables (1 for each controller, 1 for each host) without otherwise changing the configuration and see if there is any chance in performance.
  21. ChrisMiles
    Not that then. Might be something to do with MPIO since you're using iSCSI. How many paths do you have to the NAS for each host? Try removing all but 1 per host and see if things chance.
  22. ChrisMiles
    Yeah, it would either be NTFS or ReFS.
  23. ChrisMiles
    Didn't format it with ReFS did you? CSV volumes can't work properly with ReFS, at least on Server 2016, they go into redirected access mode.
  24. ChrisMiles
    Maybe not helpful but my experience is the new SMART installer will sort it out itself, you can just install over the top.
  25. ChrisMiles
    No this is not normally on, and it's not best practice to add new settings to the Default Domain Policy anyways. You can remove it from there and create a new GPO if you want.
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