[Users] March 31, 2020 Zeta Alliance Conference Call Summary

[Randy Leiker]

Hello Zeta Alliance Community, 

Here is a summary of this week’s conference call. A few brief reminders: 


    * Conference calls are every Tuesday and open to all using either the FreeConferenceCall.com VoIP app or via a dial-in number: [ https://www.freeconferencecall.com/wall/zetalliance | https://www.freeconferencecall.com/wall/zetalliance ] 
    * Each week’s call agenda can be found at: [ https://docs.google.com/document/d/1uUUDJpwp2CAylU6lxtbEdVcUX_qSbciyes6gLTWw2fY/edit | https://docs.google.com/document/d/1uUUDJpwp2CAylU6lxtbEdVcUX_qSbciyes6gLTWw2fY/edit ] 
    * A copy of each week’s summary is also posted to the Zimbra Forum: 
        * January 2020: [ https://forums.zimbra.org/viewtopic.php?f=9&t=67572 | https://forums.zimbra.org/viewtopic.php?f=9&t=67572 ] 
        * February 2020: [ https://forums.zimbra.org/viewtopic.php?f=9&t=67726 | https://forums.zimbra.org/viewtopic.php?f=9&t=67726 ] 
        * March 2020: [ http://forums.zimbra.com/viewtopic.php?f=9&t=67855 | http://forums.zimbra.com/viewtopic.php?f=9&t=67855 ] 
    * Constructive feedback on these call summaries is always welcome. 

March 31, 2020 Conference Call Summary 

Zimbra Connect "Spaces" On Mailbox Servers 
Mark S. asked how to control which mailbox server a Zimbra Connect "Space" is created on and how to move a "Space" from one server to another. Cine said that a Boolean value called "roomStoreEnabled", which is set to true by default, determines if a mailbox server is a candidate for accepting new Zimbra Connect Spaces, created by mailbox users. He said that the command: "zxsuite connect space get" displays Connect Spaces on all mailbox servers. No one on the call was certain how to move a Space to another mailbox server, so Cine said he would investigate the topic and report back on a later date. 

Disk Performance Recommendations for Zimbra NG Backups and HSM 
Noah P. asked those on the call for recommendations for disk performance specifications when using a storage array for Zimbra NG backups and as a secondary HSM. He said he is currently looking at a storage array with a rated maximum performance of 600 IOPS. Cine suggested considering using two different mount points for the storage array: one for blobs, and another for meta data, as this should greatly improve performance during restores from backups. Noah said he was already considering putting meta data on a separate SSD storage array. 

Mark S. said that in his experience when using disks in the AWS cloud service with a 500 IOPS rating, he has observed occasional slow down alerts from the NG real-time backups. Cine said that this should be less of an issue in the latest Zimbra version, as the NG backup module now incorporates intelligent caching and queueing methods. 

Randy L. said that in his experience using the VMware vSAN product with a large number of VMs, that a disk’s queue depth was critical, as compared to just IOPS, since IOPS numbers can be manipulated by manufacturers with caching trickery. He suggested looking at the queue depth specifications for the storage array that Noah is considering purchasing and mentioned that VMware’s hardware compatibility guide may be a good source for a list of drive and storage array manufacturers who publish the queue depth specification, since this information is not widely available for all drive and storage array manufacturers. 

Zimbra 9 Updates 
Mark S. asked if there were any new updates related to Zimbra 9 that the Zimbra employees on the call could share. No updates were available during the call, but more information will be forthcoming very soon. 

New Call Participant 
John Rabara of Synacor introduced himself as a sales resource for Zimbra BSPs and said he would try to join the Zeta Alliance conference calls more frequently in the future so as to contribute any information he can offer the group. 


Randy Leiker ( randy at skywaynetworks.com ) 
Skyway Networks, LLC 

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