Just thought I would let you guys know that creating a 20TB file was
successful. I even appended data to the end of it. Any operations on the file
are completely useless because they take way to long. A appended "hello" to the
end of the file no problem, but tail -n 1 {filename} yielded nothing except a
lot of disk read after 159minutes of waiting.
I don't really even know if this is good information or common knowledge.
dd bs=1000M count=20000 if=/dev/zero
of=/data/storage/ReplayDataVolume001/biggest_yet_file
r...@s2-replay02:/data/storage/ReplayDataVolume001# ls -aFl
total 1266312192
drwxr-xr-x 3 root root 3896 2009-12-31 23:31 ./
drwxr-xr-x 3 root root 88 2010-01-01 11:02 ../
-rw-r--r-- 1 root root 1048576000 2009-12-31 23:23 big_file
-rw-r--r-- 1 root root 10485760000 2009-12-31 23:24 bigger_file
-rw-r--r-- 1 root root 104857600000 2009-12-31 23:28 biggest_file
-rw-r--r-- 1 root root 20971520000006 2010-01-01 11:03 biggest_yet_file
drwxr-xr-x 2 root root 3896 2009-12-31 11:53 lost+found/
r...@s2-replay02:/data/storage/ReplayDataVolume001#
-Robert
On Jan 1, 2010, at 5:08 AM, Joel Becker wrote:
> On Fri, Jan 01, 2010 at 04:36:02AM +0900, Robert Smith wrote:
>> Oh, I found it at line #2163 of fs/ocfs2/super.c.
>>
>> I imagine that something as simple as the following would work, but perhaps
>> I'll wait for your feedback.
>>
>>
>> /*
>> if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
>>> (u32)~0UL) {
>> mlog(ML_ERROR, "Volume might try to write to blocks beyond "
>> "what jbd can address in 32 bits.\n");
>> status = -EINVAL;
>> goto bail;
>> }
>> */
>
> That should work. The real solution will check based on the
> journal flags. Be warned, there be tygers in here.
>
> Joel
>
> --
>
> "But all my words come back to me
> In shades of mediocrity.
> Like emptiness in harmony
> I need someone to comfort me."
>
> Joel Becker
> Principal Software Developer
> Oracle
> E-mail: joel.bec...@oracle.com
> Phone: (650) 506-8127
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