[Lustre-discuss] Problems & partial success on PPC64 (XServe G5) Debian cluster

[Robert Olson]

On Nov 21, 2007, at 4:55 PM, Andreas Dilger wrote:

> On Nov 21, 2007  16:37 -0600, Robert Olson wrote:
>> On Nov 21, 2007, at 4:30 PM, Andreas Dilger wrote:
>>> On Nov 19, 2007  13:25 -0600, Robert Olson wrote:
>>>> OK, early indications are good here. Started out with  MDT on  
>>>> PPC with
>>>> OST
>>>> on intel, ran iozone up to 1M files and it finished without  
>>>> error and
>>>> with
>>>> reasonable performance.
>>>
>>> Can you please run "e2fsck -fn" (from a Lustre-patched e2fsprogs)  
>>> on the
>>> filesystems after your tests.
>>
>> What will that tell me?
>
> It will tell me if some endian bug is corrupting your ext3 filesystem
> (and possibly if there are endian bugs in our e2fsprogs patches)...

Finally getting around to trying this. One one of the OSTs:

root at bio-ppc-38:~# /scratch/olson/e2fsprogs/sbin/e2fsck -fn /dev/sda4
e2fsck 1.40.4.cfs1 (31-Dec-2007)
Warning: skipping journal recovery because doing a read-only  
filesystem check.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Free blocks count wrong (119027670, counted=117766441).
Fix? no

Free inodes count wrong (30269427, counted=30057352).
Fix? no


ppcfs-OST0001: ********** WARNING: Filesystem still has errors  
**********

ppcfs-OST0001: 13/30269440 files (261.5% non-contiguous),  
2020192/121047862 blocks