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<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am currently doing an AFM based synchronization between 2 GPFS filesystems using a multicluster connection.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">It works quite well apart from the fact that on cache FS we noticed directory take 4x the size they have on home FS:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">[root@node ~]# stat /newfs/fileset/dir<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas"> File: /newfs/fileset/dir<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas"> Size: 16384 Blocks: 32 IO Block: 262144 directory<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Device: 2eh/46d Inode: 14893057 Links: 25<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Access: (2775/drwxrwsr-x) Uid: ( xxxx/ UNKNOWN) Gid: ( yyyy/ UNKNOWN)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Access: 2023-06-02 08:09:25.659095673 +0000<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Modify: 2023-01-27 08:56:09.636343000 +0000<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Change: 2023-06-01 13:22:08.972571000 +0000<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Birth: -<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span style="font-size:10.0pt;font-family:Consolas">[root@node ~]# stat /oldFS/fileset/dir<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span style="font-size:10.0pt;font-family:Consolas">
</span><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">File: </span>
<span style="font-size:10.0pt;font-family:Consolas">/oldFS/fileset/dir</span><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas"> Size: 4096 Blocks: 1 IO Block: 131072 directory<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Device: 32h/50d Inode: 8590516352 Links: 25<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Access: (2775/drwxrwsr-x) Uid: ( xxxx/ UNKNOWN) Gid: ( yyyy/ UNKNOWN)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Access: 2023-06-02 09:09:40.483041330 +0000<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Modify: 2023-01-27 08:56:09.636343000 +0000<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Change: 2023-01-27 08:56:09.644167000 +0000<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Birth: -</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I saw somewhere that AFM extended attributes should take around 200 bytes so I am a bit puzzled on why this much difference here.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I disables the AFM relationship between synced filesets but the size stay the same.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If I create a directory manually on the new filesystem, size is 4k as expected.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Any idea why we get this behaviour ? GPFS version is 5.1.6.1 on new cluster, 5.1.2.8 on old cluster.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Dieter<o:p></o:p></span></p>
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