Re: How to check if thin volume or snapshot was ever activated
Ming-Hung Tsai <[email protected]>
| Newsgroups | gmane.linux.lvm.general |
|---|---|
| Message-ID | <CAAYit8QwTiPOnRGmm269zJXe8CqdT2bHXD4fPtbb_EO91DAgtg@mail.gmail.com> |
On Mon, Aug 9, 2021 at 11:53 AM Ming-Hung Tsai <[email protected]> wrote: > > On Sat, Aug 7, 2021 at 7:43 PM Gionatan Danti <[email protected]> wrote: > > > > I wonder: can we detect if a volume/snapshot was *ever* activated? My > > reasoning is that a never-activated snapshot surely did not receive any > > application writes, so it can be safely removed (ignoring snapshot > > retention policy). > > It sounds like you intend to keep snapshots that have been updated > (written) since its creation, right? > The precise way might be checking the data mappings via thin_dump. An > updated device has data mappings with timestamps greater than the ^^^^^^^^^^^^ > device's creation time. sorry, I mean "greater than or equal to" _______________________________________________ linux-lvm mailing list [email protected] https://listman.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/