[Ocfs2-tools-devel] Patch for journal truncate of ocfs2-tools.

[Marcos E. Matsunaga]

Sunil,

Volume was 12Gb. Fsck is only called with -fy options.

I'm running a test with 20Gb Volume. Hopefully it is big enough.

Sunil Mushran wrote:
> chain_cpg is not a "corruption" per se eventhough fsck
> treats and fixes it as one. That mkfs sets cpg to < max
> possible when the device fits in one cluster group is not
> ideal but not incorrect either.
>
> Is running fsck -fy the first time round not possible? It
> will take care of this problem.
>
> Marcos, what was the size of the volume and the parameters
> passed to mkfs. I want to be sure that the problem you
> encountered is the same that Tao is referring to.
>
> tao.ma wrote:
>> Marcos E. Matsunaga wrote:
>>> Tao,
>>>
>>> Sorry about the late. I ran into some problems and finally got to
>>> run some tests today with tunefs-test.sh and the truncate program.
>>> The tunefs seems to be working fine.  Didn't find any unexpected
>>> problem with it.
>>>
>>> With the truncate, I started the script. At first it was error
>>> because it doesn't have the test_truncate binary set in the script.
>>> I did that, and it started and I let it run. After a few hours
>>> running, it showed nothing at all, like it was frozen. Hitting enter
>>> where it was running, showed an fsck error. I tried again and it
>>> does the same soon after I hit enter. I don't know if that's the
>>> expected behavior, but I found a little weird.
>> I found the same problem as you when I ran it the first time. ;)
>> It may because that your test volume is too small. When we have
>> blocksize=4K and clustersize=1M(maybe smaller, it depends on the real
>> size of your volume) then you may have only one group descriptor in
>> your "//global_bitmap". So after the volume is formatted, fsck.ocfs2
>> will find an error of "CHAIN_CPG"(You may try it by using -b 4K -C 1M
>> to format your volume and run fsck.ocfs2 immediatly after your format
>> to check whether this problem exists). I haven't added the option
>> "-y" in fsck.ocfs2 since a new-formatted volume shouldn't have any
>> errors, and that causes the program waiting for the input and looks
>> like freeze. So this problem isn't concerned with ocfs2_truncate and
>> you may use a larger volume(40G is enough) and have another try.
>>
>> Sunil, I saw your comments in the function
>> "maybe_fix_clusters_per_group" about this problem, and I remembered
>> that  you added it for the offline resize. So we have to answer "n"
>> for this output in fsck.ocfs2, right?
>>
>>
>>
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>

-- 

Regards,

Marcos Eduardo Matsunaga

Oracle USA
Linux Engineering



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