[Users] April 20, 2021 Zeta Alliance Conference Call Summary

Randy Leiker randy at skywaynetworks.com
Thu Apr 22 20:54:22 CEST 2021


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://drive.google.com/drive/folders/1xDyBJFjnfZYxuXJHiDzsXjjMuGGtIl7J | https://drive.google.com/drive/folders/1xDyBJFjnfZYxuXJHiDzsXjjMuGGtIl7J ] 
    * A copy of each week’s summary is also posted to the Zimbra Forums: 
        * All Prior Months: [ https://forums.zimbra.org/viewforum.php?f=9 | https://forums.zimbra.org/viewforum.php?f=9 ] 
        * March 2021 : [ https://forums.zimbra.org/viewtopic.php?f=9&t=69488 | https://forums.zimbra.org/viewtopic.php?f=9&t=69488 ] 
        * April 2021 : [ https://forums.zimbra.org/viewtopic.php?f=9&t=69507 | https://forums.zimbra.org/viewtopic.php?f=9&t=69507 ] 
    * Constructive feedback on these call summaries is always welcome. 

April 20, 2021 

Zextras Version In Upcoming 8.8.15 Patch 21 and 9.0 Patch 14 
Mark S. asked if the upcoming 8.8.15 Patch 21 and 9.0 Patch 14 will have the latest Zextras version included, 3.1.10 ( [ https://docs.zextras.com/zextras-suite-documentation/latest/changelog31.html#_zextras_suite_3_1_10 | https://docs.zextras.com/zextras-suite-documentation/latest/changelog31.html#_zextras_suite_3_1_10 ] ), or will it be one version prior, 3.1.9 ( [ https://docs.zextras.com/zextras-suite-documentation/latest/changelog31.html#_zextras_suite_3_1_9 | https://docs.zextras.com/zextras-suite-documentation/latest/changelog31.html#_zextras_suite_3_1_9 ] ). John H. said he believes that each Zimbra patch will always include the immediate prior version of the latest Zextras release, as there is not enough time to do regression testing of the latest Zextras version during a given month’s patch. This suggests that Zextras 3.1.9 will be included in 8.8.15 P21 and 9.0 P14. John H. added that Zextras 3.1.10 is anticipated to be included in 8.8.15 P22 and 9.0 P15. 

Follow-Up: Slow SmartScan After Installation of 8.8.15 Patch 20 
To follow-up on this April 13th Zeta Alliance call topic, Mark S. said that what he thought was a slow SmartScan issue after installing 8.8.15 P20, was not an issue after all, and was simply due to SmartScan performing a process similar to a deep scan. After it finished, backups returned to their normal performance level. Matthew F. said he looked up his SmartScan notification emails from Zimbra following the recent P20 installation, but did not see any deep scans occurring. Mark S. said that it may not be a deep scan necessarily, but appeared to be going through every mailbox (15 million objects), and was running for 3+ hours, when it normally takes about 5 minutes to complete a SmartScan process. 

Cost Savings When Using Zimbra Centralized Storage With AWS S3 
Mark S. presented storage cost/performance graphs from his AWS account showing the results after his roll out of the Centralized Storage feature to his Zimbra servers. He said that after setting up Centralized Storage, he was able to move much of his mailbox data to AWS’ S3 Intelligent-Tiering storage class ( [ https://aws.amazon.com/s3/storage-classes/ | https://aws.amazon.com/s3/storage-classes/ ] ), which is less than half the price of the Standard Storage class, providing a significant cost savings in his environment. He added that he has an HSM policy setup that moves mail items older than a few days to the Intelligent-Tiering class, and his customers have reported no adverse performance impacts with this new configuration. Matthew F. asked if Mark set this up for his Zimbra backups too? Matthew said that if a deep SmartScan was run following the installation of a given Zimbra patch, he was wondering if that would effect the ability to keep mailbox data in the lower cost Intelligent-Tiering class. Mark S. said that he is using the same storage classes for his backups and that he has not observed any adverse effects on the storage classes and cost savings. He did however say that he has noticed that backups seem to take a longer amount of time to run, probably due to the process of zipping up the individual mail blobs, then uploading those files to S3. He explained that he opened a support case with AWS asking about rate limiting with the storage services he is using, and that Support took a close look at what Mark has been doing, and said that he is no where near the rate limits that AWS applies to their customers’ hosted instances. Mark S. said he is hoping that future versions of Zextras can make more improvements in storage throughput when using S3 storage. 

FIPS Support in Zimbra 9.0 Patch 13 Causes Postfix Crash 
Mark S. shared a post in the Zimbra Forum ( [ https://forums.zimbra.org/viewtopic.php?f=13&t=69499 | https://forums.zimbra.org/viewtopic.php?f=13&t=69499 ] ) discussing an issue in Zimbra 9.0 P13 where the Zimbra MTA (Postfix) SMTP process can crash when configured to use the new FIPS mode introduced in Patch 13. He suggested to John H. that the release notes for 8.8.15 and 9.0 should be updated to advise Zimbra administrators of the setting that needs to be set to avoid this issue. John H. said he is working on it and hopes to have it updated soon. 


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