Re: [Ocfs2-devel] Ocfs2-devel Digest, Vol 127, Issue 25
Hi Joseph and Srinivas, We had merged and test the two patches: 1.ocfs2: o2net: set tcp user timeout to max value 8e9801dfe37c9e68cdbfcd15988df2187191864e 2.ocfs2: o2net: don't shutdown connection when idle timeout c43c363def04cdaed0d9e26dae846081f55714e7 They are works well as we shut down and up the Ethernet interface manually and intervals to create the scenarios with shell scripts, the issues cat not be recreated. Thanks you for reviews and better advices. There is another question. As the node number rises to 32 or 128 in one cluster, we think the TCP keep alive MSG interval should be make longer from 2 seconds to 10 seconds and the idle timeout value should be 6ms or 9ms. We think it can reduce the non-useful keep alive messages and improve the performance of the TCP connection. O2CB_IDLE_TIMEOUT_MS=3 to 9 O2CB_KEEPALIVE_DELAY_MS=2000 to 1 We test the values and the changes works well. Is there any side effect? We are forward your better thoughts about that. Thanks. - 本邮件及其附件含有杭州华三通信技术有限公司的保密信息，仅限于发送给上面地址中列出 的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、 或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本 邮件！ This e-mail and its attachments contain confidential information from H3C, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it! ___ Ocfs2-devel mailing list Ocfs2-devel@oss.oracle.com https://oss.oracle.com/mailman/listinfo/ocfs2-devel
Re: [Ocfs2-devel] Ocfs2-devel Digest, Vol 127, Issue 25
On 2014/10/9 15:16, Guozhonghua wrote: Hi Joseph and Srinivas, We had merged and test the two patches: 1.ocfs2: o2net: set tcp user timeout to max value 8e9801dfe37c9e68cdbfcd15988df2187191864e 2.ocfs2: o2net: don't shutdown connection when idle timeout c43c363def04cdaed0d9e26dae846081f55714e7 They are works well as we shut down and up the Ethernet interface manually and intervals to create the scenarios with shell scripts, the issues cat not be recreated. Thanks you for reviews and better advices. There is another question. As the node number rises to 32 or 128 in one cluster, we think the TCP keep alive MSG interval should be make longer from 2 seconds to 10 seconds and the idle timeout value should be 6ms or 9ms. We think it can reduce the non-useful keep alive messages and improve the performance of the TCP connection. O2CB_IDLE_TIMEOUT_MS=3 to 9 O2CB_KEEPALIVE_DELAY_MS=2000 to 1 In my opinion, O2CB_IDLE_TIMEOUT_MS can be changed to suit your scenario. But for O2CB_KEEPALIVE_DELAY_MS, I don't think you have to change it. It will send keepalive packet only if there is no DLM messages between nodes. We test the values and the changes works well. Is there any side effect? We are forward your better thoughts about that. Thanks. - 本邮件及其附件含有杭州华三通信技术有限公司的保密信息，仅限于发送给上面地址中列出 的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、 或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本 邮件！ This e-mail and its attachments contain confidential information from H3C, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it! ___ Ocfs2-devel mailing list Ocfs2-devel@oss.oracle.com https://oss.oracle.com/mailman/listinfo/ocfs2-devel
[Ocfs2-devel] Hi, is there any way to restore the corrupted disk? Thanks.
Hi, All As we test the OCFS2, the disk is corrupted with dd command manually and so some meta data is lost. We restore the data, there is about 1M meta data can't restored. How can we restore the data from disk? So from 0010 to 00207000, the meta data is lost. Is anywhere on the disk backup this meta data? Thanks fsck.ocfs2 -r 6 /dev/sdd fsck.ocfs2 1.6.3 [RECOVER_BACKUP_SUPERBLOCK] Recover superblock information from backup block#268435456? n y fsck.ocfs2: Bad magic number in inode while initializing the DLM fsck.ocfs2 -fpy /dev/sdd fsck.ocfs2 1.6.3 fsck.ocfs2: Bad magic number in inode while initializing the DLM 2180 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || * 0020 00 00 00 00 00 40 00 00 00 00 00 00 00 00 00 00 |.@..| 00200010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || * 00207000 49 4e 4f 44 45 30 31 00 f7 50 ac 08 ff ff 07 00 |INODE01..P..| The disk layout is as below: root@H3CRDS14-RD:~# hexdump -C /dev/sdd |more 02 02 02 02 02 02 02 02 74 68 69 73 20 69 73 20 |this is | 0010 61 6e 20 6f 63 66 73 32 20 76 6f 6c 75 6d 65 00 |an ocfs2 volume.| 0020 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 || * 0080 02 02 02 02 02 02 02 02 74 68 69 73 20 69 73 20 |this is | 0090 61 6e 20 6f 63 66 73 32 20 76 6f 6c 75 6d 65 00 |an ocfs2 volume.| 00a0 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 || * 0230 74 68 69 73 20 69 73 20 61 6e 20 6f 63 66 73 32 |this is an ocfs2| 0240 20 76 6f 6c 75 6d 65 00 02 02 02 02 02 02 02 02 | volume.| 0250 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 || * 0280 02 02 02 02 74 68 69 73 20 69 73 20 61 6e 20 6f |this is an o| 0290 63 66 73 32 20 76 6f 6c 75 6d 65 00 02 02 02 02 |cfs2 volume.| 02a0 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 || * 2000 4f 43 46 53 56 32 00 00 f7 50 ac 08 ff ff ff ff |OCFSV2...P..| 2010 00 00 00 00 00 00 30 00 00 00 00 00 00 00 00 00 |..0.| 2020 00 00 00 00 00 00 00 00 00 00 00 00 31 00 00 00 |1...| 2030 00 00 00 00 00 00 00 00 ad 60 38 51 00 00 00 00 |.`8Q| 2040 ad 60 38 51 00 00 00 00 00 00 00 00 00 00 00 00 |.`8Q| 2050 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || 2060 f7 50 ac 08 00 00 00 00 00 00 00 00 00 00 00 00 |.P..| 2070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || * 20c0 00 00 5a 00 00 00 14 00 00 00 00 00 00 00 00 00 |..Z.| 20d0 ad 60 38 51 00 00 00 00 00 00 00 00 03 00 00 00 |.`8Q| 20e0 50 12 00 00 01 00 00 00 01 02 00 00 00 00 00 00 |P...| 20f0 02 02 00 00 00 00 00 00 0c 00 00 00 14 00 00 00 || 2100 20 00 00 00 9e 53 a1 c8 00 01 00 00 00 00 00 00 | S..| 2110 74 61 72 67 65 74 31 30 31 00 00 00 00 00 00 00 |target101...| 2120 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || * 2150 03 5b a0 58 db fc 4e a7 81 c1 31 4a f5 ae 3c a3 |.[.X..N...1J...| 2160 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || 2170 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 || 2180 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || * 0020 00 00 00 00 00 40 00 00 00 00 00 00 00 00 00 00 |.@..| 00200010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || * 00207000 49 4e 4f 44 45 30 31 00 f7 50 ac 08 ff ff 07 00 |INODE01..P..| 00207010 00 00 00 00 00 00 30 00 00 00 00 00 00 00 00 00 |..0.| 00207020 00 00 00 00 00 03 00 00 a4 81 01 00 91 04 00 00 || 00207030 ad 60 38 51 00 00 00 00 ad 60 38 51 00 00 00 00 |.`8Q.`8Q| 00207040 ad 60 38 51 00 00 00 00 00 00 00 00 00 00 00 00 |.`8Q| 00207050 07 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || 00207060 f7 50 ac 08 00 00 00 00 00 00 00 00 00 00 00 00 |.P..| 00207070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || * - 本邮件及其附件含有杭州华三通信技术有限公司的保密信息，仅限于发送给上面地址中列出 的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、 或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本 邮件！ This e-mail and its attachments contain confidential information from H3C, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email
Re: [Ocfs2-devel] Ocfs2-devel Digest, Vol 127, Issue 25
On 10/09/2014 12:53 AM, Joseph Qi wrote: On 2014/10/9 15:16, Guozhonghua wrote: Hi Joseph and Srinivas, We had merged and test the two patches: 1.ocfs2: o2net: set tcp user timeout to max value 8e9801dfe37c9e68cdbfcd15988df2187191864e 2.ocfs2: o2net: don't shutdown connection when idle timeout c43c363def04cdaed0d9e26dae846081f55714e7 They are works well as we shut down and up the Ethernet interface manually and intervals to create the scenarios with shell scripts, the issues cat not be recreated. Thanks you for reviews and better advices. There is another question. As the node number rises to 32 or 128 in one cluster, we think the TCP keep alive MSG interval should be make longer from 2 seconds to 10 seconds and the idle timeout value should be 6ms or 9ms. We think it can reduce the non-useful keep alive messages and improve the performance of the TCP connection. O2CB_IDLE_TIMEOUT_MS=3 to 9 O2CB_KEEPALIVE_DELAY_MS=2000 to 1 In my opinion, O2CB_IDLE_TIMEOUT_MS can be changed to suit your scenario. But for O2CB_KEEPALIVE_DELAY_MS, I don't think you have to change it. It will send keepalive packet only if there is no DLM messages between nodes. We test the values and the changes works well. As Joseph explained they both are tunables, you can run service o2cb configure to change values. It falls down to how sensitive your application want to be to detect network problems. Can you please elaborate on what you meant by changes works well. How did you test it and what you found ? Is there any side effect? We are forward your better thoughts about that. Thanks. - 本邮件及其附件含有杭州华三通信技术有限公司的保密信息，仅限于发送给上面地址中列出 的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、 或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本 邮件！ This e-mail and its attachments contain confidential information from H3C, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it! ___ Ocfs2-devel mailing list Ocfs2-devel@oss.oracle.com https://oss.oracle.com/mailman/listinfo/ocfs2-devel
