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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The strace looks like this (on all files) :
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.755319 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P069_F01589.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001389><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.756775 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P035_F01592.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001532><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.758376 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P085_F01559.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001429><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.759873 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P027_F01569.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001377><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.761317 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P002_F01581.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001420><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.762804 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P050_F01568.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001345><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.764216 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P089_F01567.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001541><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.765828 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P010_F01594.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001358><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.767252 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P045_F01569.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001396><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.768715 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P036_F01592.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.002072><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.770854 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P089_F01568.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001722><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.772643 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P009_F01600.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001281><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1354662591.773992 lstat64("TEW_STRESS_TEST_VM.1K_100P_10000F.P022_F01583.txt", {st_mode=S_IFREG|0664, st_size=1000, ...}) = 0 <0.001413><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We are using a 32 bits architecture, can it be the cause of the kernel not having enough memory ? Any possibility to change this behavior ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:10.0pt;line-height:115%"><span style="font-size:10.0pt;line-height:115%;font-family:"Calibri","sans-serif";color:#1F497D"><img width="132" height="117" id="Image_x0020_1" src="cid:image001.png@01CDD27D.2D1C0B50" alt="Description : Description : Description : cid:image001.png@01CD01F3.35091200"></span><span style="font-size:10.0pt;line-height:115%;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:#559796"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#559796">Amaury FRANCOIS</span></b><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#559796"> •</span><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#F0AB37">
</span><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#F0AB37">Ingénieur</span></b><span style="font-family:"Calibri","sans-serif";color:#559796"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#559796">Mobile +33 (0)6 88 12 62 54<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="mailto:amaury.francois@digora.com">amaury.francois@digora.com</a></span></b><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#559796">
<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:6.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Siège Social – 66 rue du Marché Gare – 67200 STRASBOURG<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Tél : 0 820 200 217 - +33 (0)3 88 10 49 20
</span><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:10.0pt;line-height:115%"><span style="font-size:10.0pt;line-height:115%;font-family:"Calibri","sans-serif";color:#1F497D"><img border="0" width="237" height="122" id="Image_x0020_2" src="cid:image002.jpg@01CDD27D.2D1C0B50" alt="Description : test"></span><span style="font-size:10.0pt;line-height:115%;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">De :</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Sunil Mushran [mailto:sunil.mushran@gmail.com]
<br>
<b>Envoyé :</b> mardi 4 décembre 2012 18:29<br>
<b>À :</b> Amaury Francois<br>
<b>Cc :</b> ocfs2-users@oss.oracle.com<br>
<b>Objet :</b> Re: [Ocfs2-users] "ls" taking ages on a directory containing 900000 files<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">strace -p PID -ttt -T<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Attach and get some timings. The simplest guess is that the system lacks memory to cache all the inodes<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">and thus has to hit disk (and more importantly take cluster locks) for the same inode repeatedly. The user<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">guide has a section in NOTES explaining this.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Tue, Dec 4, 2012 at 8:54 AM, Amaury Francois <<a href="mailto:amaury.francois@digora.com" target="_blank">amaury.francois@digora.com</a>> wrote:<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hello,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">We are running OCFS2 1.8 and on a kernel UEK2. An ls on a directory containing approx. 1 million of files is very long (1H). The features we have activated on
the filesystem are the following : </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">[root@pa-oca-app10 ~]# debugfs.ocfs2 -R "stats" /dev/sdb1</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Revision: 0.90</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Mount Count: 0 Max Mount Count: 20</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> State: 0 Errors: 0</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Check Interval: 0 Last Check: Fri Nov 30 19:30:17 2012</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Creator OS: 0</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Feature Compat: 3 backup-super strict-journal-super</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Feature Incompat: 32592 sparse extended-slotmap inline-data metaecc xattr indexed-dirs refcount discontig-bg clusterinfo</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Tunefs Incomplete: 0</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Feature RO compat: 1 unwritten</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Root Blknum: 5 System Dir Blknum: 6</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> First Cluster Group Blknum: 3</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Block Size Bits: 12 Cluster Size Bits: 12</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Max Node Slots: 8</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Extended Attributes Inline Size: 256</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Label: exchange2</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> UUID: 2375EAF4E4954C4ABB984BDE27AC93D5</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Hash: 2880301520 (0xabade9d0)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> DX Seeds: 1678175851 1096448356 79406012 (0x6406ee6b 0x415a7964 0x04bba3bc)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Cluster stack: o2cb</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Cluster name: appcluster</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Cluster flags: 1 Globalheartbeat</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Inode: 2 Mode: 00 Generation: 3567595533 (0xd4a5300d)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> FS Generation: 3567595533 (0xd4a5300d)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> CRC32: 0c996202 ECC: 0819</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Type: Unknown Attr: 0x0 Flags: Valid System Superblock</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Dynamic Features: (0x0)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> User: 0 (root) Group: 0 (root) Size: 0</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Links: 0 Clusters: 5242635</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> ctime: 0x508eac6b 0x0 -- Mon Oct 29 17:18:51.0 2012</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> atime: 0x0 0x0 -- Thu Jan 1 01:00:00.0 1970</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> mtime: 0x508eac6b 0x0 -- Mon Oct 29 17:18:51.0 2012</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> dtime: 0x0 -- Thu Jan 1 01:00:00 1970</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Refcount Block: 0</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Last Extblk: 0 Orphan Slot: 0</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Sub Alloc Slot: Global Sub Alloc Bit: 65535</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">May inline-data or xattr be the source of the problem ?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Thank you.
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
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<span style="font-size:10.0pt;line-height:115%;color:#1F497D"><img border="0" width="132" height="117" id="_x0000_i1025" src="cid:image001.png@01CDD27D.2D1C0B50" alt="Description : Description : Description : cid:image001.png@01CD01F3.35091200"></span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="color:#559796">Amaury FRANCOIS</span></b><span style="font-size:14.0pt;color:#559796"> •</span><span style="font-size:14.0pt;color:#F0AB37">
</span><b><span style="color:#F0AB37">Ingénieur</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;color:#559796">Mobile
<a href="tel:%2B33%20%280%296%2088%C2%A0%2012%2062%2054" target="_blank">+33 (0)6 88 12 62 54</a></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt"><a href="mailto:amaury.francois@digora.com" target="_blank">amaury.francois@digora.com</a><span style="color:#559796">
</span></span></b><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:9.0pt">Siège Social – 66 rue du Marché Gare – 67200 STRASBOURG</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt">Tél : 0 820 200 217 -
<a href="tel:%2B33%20%280%293%2088%2010%2049%2020" target="_blank">+33 (0)3 88 10 49 20</a>
</span><o:p></o:p></p>
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