Hi Matt,
The problem you came across was due to a change made in the rados bench along with the Firefly release, it aimed to solve the problem that if there were multiple rados instance (for writing), we want to do a rados read for each run as well.
Unfortunately, that change broke your user case, here is my suggestion to solve your problem:
1. Remove the pre-defined metadata file by
$ rados -p {pool_name} rm benchmark_last_metadata
2. Cleanup by prefix
$ sudo rados -p {pool_name} cleanup --prefix bench
Moving forward, you can use the new parameter ?--run-name? to name each turn of run and cleanup on that basis, if you still want to do a slow liner search to cleanup, be sure removing the benchmark_last_metadata object before you kick off running the cleanup.
Let me know if that helps.
Thanks,
Guang
On May 20, 2014, at 6:45 AM, Matt.Latter at hgst.com wrote:
>
> I was experimenting previously with 0.72 , and could easily cleanup pool
> objects from several previous rados bench (write) jobs with :
>
> rados -p <poolname> cleanup bench (would remove all objects starting
> with "bench")
>
> I quickly realised when I moved to 0.80 that my script was broken and
> theoretically I now need:
>
> rados -p <poolname> cleanup --prefix benchmark_data
>
> But this only works sometimes, and sometimes partially. Issuing the command
> line twice seems to help a bit ! Also if I do "rados -p <poolname> ls"
> before hand, it seems to increase my chances of success, but often I am
> still left with benchmark objects undeleted. I also tried using the
> --run-name option to no avail.
>
> The story gets more bizarre now I have set up a "hot SSD" cachepool in
> front of the backing OSD (SATA) pool. Objects won't delete from either pool
> with rados cleanup I tried
>
> "rados -p <cachepoolname> cache-flush-evict-all"
>
> which worked (rados df shows all objects now on the backing pool). Then
> bizarrely trying cleanup from the backing OSD pool just appears to copy
> them back into the cachepool, and they remain on the backing pool.
>
> I can list individual object names with
>
> rados -p <poolname> ls
>
> but rados rm <objectname> will not remove individual objects stating "file
> or directory not found".
>
> Are others seeing these things and any ways to work around or am I doing
> something wrong? Are these commands now deprecated in which case what
> should I use?
>
> Ubuntu 12.04, Kernel 3.14.0
>
> Matt Latter
>
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