<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi,<div><br></div><div>We have experienced a situation where we are left with large number of thin snapshots (around 500) and snapshot removal wont work anymore (we suspect a lock-up situation caused by trying to remove thin snapshots that is still mounted - thou its not verified yet - just a speculation). The only path to recover seems to be disabling all thin volumes from fstab and booting into single-user mode - where lvremove -f usually succeeds on these thin snapshots. But LVM init and lvremove take a huge amount of time with large number of snapshots - initial LVM activation is going on about 6-8 minutes at least and every lvremove takes ca 20-50 sec - depending on snapshot count left. After snapshots are removed thin volumes can be enabled again and fsck-ed and resuming normal operations.</div><div><br></div><div>Althou we are not yet sure what is causing the lockup - so that snapshots cant be removed anymore without reboot - its also problematic that with large numbers of snapshots all LVM device operations are dead slow. I hope this issue can be addressed somehow in the future.</div><div><br></div><div>Kind regards,<br><div><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; ">-- </div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; ">----------------------------------------------</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; ">Andres Toomsalu, <a href="mailto:andres@opennodecloud.com">andres@opennodecloud.com</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; "><a href="http://www.opennodecloud.com">http://www.opennodecloud.com</a></div></div></div></span></span>
</div>
<br></div></div></body></html>