Details
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Bug
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Resolution: Cannot Reproduce
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Minor
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None
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Lustre 2.10.0
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None
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1 Client, 1 OST, 1/2/4/8/16 MDTs
master, build# 3550
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3
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9223372036854775807
Description
Scalability testing for 1/2/4/8/16 MDTs
Works perfectly fine till 8 MDTs
As moved to 16 MDTs saw following messages:
Create snapshot for 16 MDTs
[root@eagle-52vm2 ~]# lctl snapshot_create -c TEST5 -F lustre -n MDT16 ssh_exchange_identification: Connection closed by remote host ssh_exchange_identification: Connection closed by remote host [root@eagle-52vm2 ~]# lctl snapshot_list -F lustre filesystem_name: lustre snapshot_name: MDT16 create_time: Thu Apr 20 05:28:21 2017 modify_time: Thu Apr 20 05:28:21 2017 comment: TEST5 snapshot_fsname: 5594a65 status: not mount filesystem_name: lustre snapshot_name: MDT8 modify_time: Thu Apr 20 05:14:13 2017 create_time: Thu Apr 20 05:14:13 2017 snapshot_fsname: 58754c5 comment: TEST4 status: not mount [root@eagle-52vm2 ~]# lctl snapshot_destroy -f -F lustre -n MDT8 ssh_exchange_identification: Connection closed by remote host ssh_exchange_identification: Connection closed by remote host [root@eagle-52vm2 ~]# lctl snapshot_list -F lustre filesystem_name: lustre snapshot_name: MDT16 create_time: Thu Apr 20 05:28:21 2017 modify_time: Thu Apr 20 05:28:21 2017 comment: TEST5 snapshot_fsname: 5594a65 status: not mount [root@eagle-52vm2 ~]# lctl snapshot_destroy -F lustre -n MDT16 ssh_exchange_identification: Connection closed by remote host ssh_exchange_identification: Connection closed by remote host ssh_exchange_identification: Connection closed by remote host Miss snapshot piece on the MDT0003. Use '-f' option if want to destroy it by force. Can't destroy the snapshot MDT16 [root@eagle-52vm2 ~]# lctl snapshot_destroy -f -F lustre -n MDT16 ssh_exchange_identification: Connection closed by remote host ssh_exchange_identification: Connection closed by remote host [root@eagle-52vm2 ~]# lctl snapshot_list -F lustre
Even though the snapshot is created on creation and destroyed whenever the appropriate command is used, but still get the connection closed by remote host message. Only seen for 16 MDTs configuration, not for 1/2/4/8 MDTs.