On Fri, Mar 9, 2018 at 7:14 AM Yan, Zheng <ukernel@xxxxxxxxx> wrote:
ceph-dencoder can dump individual metadata. most cephfs metadata are
stored in omap headers/values. you can write a scripts that fetch
metadata objects' omap header/values and dump them using
ceph-dencoder.
Keep in mind that if you do this, you may get stale values for directories and inodes that are very busy, though. (They'll stick around in the mds log and I don't remember how stale they are allowed to get before being flushed out.)
Depending on your specific needs, don't forget that if you look at the recursive statistics you can find out the size of a whole subtree and see if anything underneath a specific directory has been touched, so you don't need to traverse ones which haven't changed since the last report.
-Greg
On Fri, Mar 9, 2018 at 10:09 PM, Pavan, Krish <Krish.Pavan@xxxxxxxxxx> wrote:
> Hi All,
>
> We have cephfs with larger size( > PB) and expected to grow more. I need to
> dump the metadata ( cinode,Cdir with ACL, size, ctime, …) weekly to
> find/report usage as well as acl.
>
> Is there any tool to dump the metadata pool and decode, without going via
> MDS servers?.
>
> What is the best way to do?
>
>
>
> Regards
>
> Krish
>
>
>
>
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> ceph-users@xxxxxxxxxxxxxx
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>
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