SLASH2 blog

A quick example of a SLASH2 file replication

Jul 22, 2011 by pauln

This example was given during the TG’11 talk but I thought it may be of interest so I’m copying the results here.

First, create a file to replicate:

(pauln@peel0:~)$ dd if=/dev/zero of=/p0_archive/pauln/big_file count=2k bs=1M
2048+0 records in
2048+0 records out
2147483648 bytes (2.1 GB) copied, 4.81828 seconds, 446 MB/s

Next, view its status with msctl:

(pauln@peel0:msctl)$ ./msctl -r /p0_archive/pauln/big_file
file-replication-status                                       #valid #bmap %prog
================================================================================
/p0_archive/pauln/big_file
new-bmap-repl-policy: one-time
  archsliod@PSCARCH                                              16    16    100%
    ++++++++++++++++

Request replication of the entire file:

(pauln@peel0:msctl)$ date && ./msctl -Q archlime@PSCARCH:*:/p0_archive/pauln/big_file
Wed Jul 20 02:51:56 EDT 2011
(pauln@peel0:msctl)$

Now check the status with msctl:

(pauln@peel0:msctl)$ date && ./msctl -r /p0_archive/pauln/big_file
Wed Jul 20 02:51:57 EDT 2011
file-replication-status                                        #valid #bmap %prog
=================================================================================
/p0_archive/pauln/big_file
new-bmap-repl-policy: one-time
  archsliod@PSCARCH                                                16   16  100%
    ++++++++++++++++
  archlime@PSCARCH                                                  0   16     0%
    sqqqqqqqqqqqqqqq

(pauln@peel0:msctl)$ date && ./msctl -r /p0_archive/pauln/big_file
Wed Jul 20 02:52:05 EDT 2011
file-replication-status                                        #valid #bmap %prog
=================================================================================
/p0_archive/pauln/big_file
new-bmap-repl-policy: one-time
  archsliod@PSCARCH                                                16   16   100%
    ++++++++++++++++
  archlime@PSCARCH                                                 10   16 62.50%
    ++++++++++qqqqqq

(pauln@peel0:msctl)$ date && ./msctl -r /p0_archive/pauln/big_file
Wed Jul 20 02:52:20 EDT 2011
file-replication-status                                        #valid #bmap %prog
=================================================================================
/p0_archive/pauln/big_file
new-bmap-repl-policy: one-time
  archsliod@PSCARCH                                                16   16   100%
    ++++++++++++++++
  archlime@PSCARCH                                                 16   16   100%
    ++++++++++++++++

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