Hi Jeremy, thanks for sharing your experience here. I am not a lvmthin expert, but in the past the **fstrim** command works fine for my needs.
See "Using fstrim to increase free space in a thin pool LV“ - http://man7.org/linux/man-pages/man7/lvmthin.7.html <http://man7.org/linux/man-pages/man7/lvmthin.7.html> Best regards, Oliver > Am 07.10.2019 um 21:32 schrieb [email protected]: > > After a week of downtime from a thin pool that had 100% full metadata I > decided to rebuild my single node. My post was formerly titled: Ovirt 4.2.7 > won't start and drops to emergency console. I have backups of nearly all my > VMs and I am working on importing them. I went from version 4.2.7.1 to > 4.3.6. I am comfortable with LVM but I am new to administering thin pool > LVM. I am asking myself what can I do to avoid this headache in the future? > What practical steps should I take? > -Regular backups > -Monitoring > -Proper configuration > > It's the last one that is the most difficult for me. You don't know what you > don't know.... Can anyone share tips and advice? > > I learned that /etc/LVM has backups. It should be part of the backup > strategy. I now know that thin pools have a special metadata volume that > should be monitored for disk space. > > At the time I built the system I used the gedploy gluster config file. I had > assumed the values in there were "safe". As I found out the hard way, > reality proved otherwise. I was reading elsewhere about allowing the thin > volume to grow 20% as needed but no real mention of how to do that or a good > example. As I understand it, the config to make that happen exists in > lvm.conf. Is that right? > > Have there been any changes in Ansible GlusterFS setup since 4.2.7 to choose > different "safe" values with newer versions? > > I hope my comments won't be taken as critical by any Dev Team members > regarding Ansible. My sole intent for this post is so I learn what to do > better/right next time. I do have most of my VMs and the few I lost are not > critical. It was lucky that I learned a hard lesson the easy way. > > Thanks for your input! > _______________________________________________ > Users mailing list -- [email protected] > To unsubscribe send an email to [email protected] > Privacy Statement: https://www.ovirt.org/site/privacy-policy/ > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/[email protected]/message/YEBEHAQKF7CNIU4K6KG4DNA5FINK35VV/
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