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MariaDB MariaDB 10.1.16 now available

Discussion in 'MariaDB & General MySQL news & discussions' started by eva2000, Jul 19, 2016.

  1. eva2000

    eva2000 Administrator Staff Member

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    ProtectHome only CentOS 7 specific AFAIK and working on auto fix for centmin mod install and updates.

    It's okay to disable ProtectHome , centmin mod been using the current config for years ! And well better that having not enough /tmp disk free space and not being able to properly repair corrupted data in mysql
     
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  2. Revenge

    Revenge Active Member

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    Making a symlink from /tmp to /home/tmp would bypass it?
     
  3. eva2000

    eva2000 Administrator Staff Member

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    tried and doesn't bypass the ProtectHome=true systemd setting
     
  4. eva2000

    eva2000 Administrator Staff Member

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  5. rdan

    rdan Well-Known Member

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  6. Sunka

    Sunka Well-Known Member

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  7. eva2000

    eva2000 Administrator Staff Member

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    yeah strangely i read about mariadb 10.1 ProtectHome=true changes a few days ago on their jira tracker but didn't piece it together that it would be a problem for tmpdir path centmin mod sets heh

    Thinking about it the reasoning behind custom tmpdir=/home/mysqltmp dated back to pre-centos 7 days when you could run Centmin Mod on 256MB VPS.. usually the /tmp would of been of very small disk free size which isn't sufficient for any sizeable mysql database's repair and recovery phase admin tasks. It's also a problem on some dedicated servers when you do not partition and size /tmp properly for mysql usage. Hence, the custom tmpdir path as usually /home partition is the largest of them all disk free wise.
     
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  8. Xon

    Xon Active Member

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    I've had MariaDB 10.1.16 crash a few times now. Thinking I might need to rollback to 10.1.14

    I've got a 3-node cluster with maxscale in-front of it. So having a node drop isn't the end of the world, just annoying as hell.
     
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  9. eva2000

    eva2000 Administrator Staff Member

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  10. Xon

    Xon Active Member

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    It was a Galera-related crash decoding a packet, and there has been a ton of fixes related to it for the next version.

    There is one major problem with Maxscale. Maxscale can't send prepared statements to slaves using using read/write OR the round-robin query router plugin.

    Which is rather anoying!
     
    Last edited: Aug 3, 2016
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  11. eva2000

    eva2000 Administrator Staff Member

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    Yeah Galera has a few gotchas and limitations folks need to read up on as to whether it's suited for the usage.
     
  12. Xon

    Xon Active Member

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    It looks like the maxscale round-robin query router does support prepared statements being distributed. I think I just wasn't reading the kinda poorly written doco properly, but I'll test it first before assuming it does :p

    In a 3 node cluster MariaDB 10.1.16, I've now had every node crash with a crappy error message. Normally I give it some time before upgrading the database, but lucked out this time.

    Guess I'll be doing a rollback in a few days when I've got some time after work :(
     
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  13. eva2000

    eva2000 Administrator Staff Member

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    sweet - yeah documentation ain't MariaDB's strong suit heh

    Yeah here's to MariaDB 10.1.7 heh
     
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  14. Xon

    Xon Active Member

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    Just downgraded one of the nodes to 10.1.14 since that node on .16 has now crashed 3 times in the last week. Will do the rest when it isn't late-o-clock
     
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  15. eva2000

    eva2000 Administrator Staff Member

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    fingers crossed.. hopefully that fixes it - such a pain to live on the bleeding edge of technology sometimes :D
     
  16. Xon

    Xon Active Member

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    Downgraded the remaining two nodes, only took a couple of minutes.

    Because it wasn't a crash it was able to use the change cache to stream the tiny changes rather than forcing the node to be reseeded :D
     
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  17. eva2000

    eva2000 Administrator Staff Member

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    nice the fruits of complexity :)
     
  18. nofun

    nofun New Member

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    works well of course. thanks a lot. // spent few hours by myself until looked in to forum :(
     
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  19. eva2000

    eva2000 Administrator Staff Member

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    You're welcome :) Forums are useful for such :D