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Top Forums UNIX for Dummies Questions & Answers Is it better/possible to pause the rsyncing of a very large directory? Post 302713527 by jim mcnamara on Wednesday 10th of October 2012 11:53:24 PM
Old 10-11-2012
On restart: rsync takes a list of source files and looks at file times. Then compares those times to the existing destination filetimes. If you already copied 8000 files and those 8000 files match what is in the new directory, rsync can figure that out in a few minutes, tops. It then goes on to copy the files it has not already done. That takes time. rsync has to read and hash every block, send it write it and verify using the hash.


It really sounds like you need to segment your operation if you want to max I/O throughput. Of course if this is production, then you cannot eat the box alive just for rsync.
 

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OCF_HEARTBEAT_RSYNCD(7) 					OCF resource agents					   OCF_HEARTBEAT_RSYNCD(7)

NAME
ocf_heartbeat_rsyncd - Manages an rsync daemon SYNOPSIS
rsyncd [start | stop | monitor | meta-data | validate-all] DESCRIPTION
This script manages rsync daemon SUPPORTED PARAMETERS
binpath The rsync binary path. For example, "/usr/bin/rsync" (optional, string, default "rsync") conffile The rsync daemon configuration file name with full path. For example, "/etc/rsyncd.conf" (optional, string, default "/etc/rsyncd.conf") bwlimit This option allows you to specify a maximum transfer rate in kilobytes per second. This option is most effective when using rsync with large files (several megabytes and up). Due to the nature of rsync transfers, blocks of data are sent, then if rsync determines the transfer was too fast, it will wait before sending the next data block. The result is an average transfer rate equaling the specified limit. A value of zero specifies no limit. (optional, string, no default) SUPPORTED ACTIONS
This resource agent supports the following actions (operations): start Starts the resource. Suggested minimum timeout: 20s. stop Stops the resource. Suggested minimum timeout: 20s. monitor Performs a detailed status check. Suggested minimum timeout: 20s. Suggested interval: 60s. validate-all Performs a validation of the resource configuration. Suggested minimum timeout: 20s. meta-data Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5s. EXAMPLE
The following is an example configuration for a rsyncd resource using the crm(8) shell: primitive p_rsyncd ocf:heartbeat:rsyncd op monitor depth="0" timeout="20s" interval="60s" SEE ALSO
http://www.linux-ha.org/wiki/rsyncd_(resource_agent) AUTHOR
Linux-HA contributors (see the resource agent source for information about individual authors) resource-agents UNKNOWN 06/09/2014 OCF_HEARTBEAT_RSYNCD(7)
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