Rsync quite slow (using very little cpu): how to improve its speed? Post: 303018387

Sponsored Content

Operating Systems Solaris Rsync quite slow (using very little cpu): how to improve its speed? Post 303018387 by priyadarshan on Tuesday 5th of June 2018 09:49:13 AM

06-05-2018

Registered User

No, I have been running tests on a new system, with just OS install,

Code:

NAME    SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
 rpool   476G   136G   340G        -         -     0%    28%  1.00x  ONLINE  -

After advice on this forum, I simplified testing, now only on local SSD.

I created a 10G file (with urandom, to avoid zfs caching), and had following results (tested many times, best result reported):

Code:

### cp to same SDD

root@omniosce:~# time cp random.bin random1.bin

real    0m5.671s
user    0m0.134s
sys     0m4.974s

root@omniosce:~# time rsync -a random.bin random2.bin

real    1m25.644s
user    2m24.261s
sys     0m14.273s

### rsync'ing to same SDD with Joyent pkgsrc rsync

root@omniosce:~# time /opt/local/bin/rsync -a random.bin random1.bin

real    0m31.302s
user    0m40.634s
sys     0m13.994s

The last result is very close to what I get with FreeBSD on exact same hardware.

So, it seems to me, a possible reason could lie in OmniOS core rsync.

Last edited by priyadarshan; 06-05-2018 at 11:16 AM..

priyadarshan

View Public Profile for priyadarshan

Find all posts by priyadarshan

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

network speed is slow

Hello, everyone: i encounter a problem these days , pls help me ,thanks in advance. my env: machine: ES40 A ES40 B os: true64 Unix 4.0f note: src.tar 8M network card speed 100M my problem: ...

2. AIX

cpu speed

how do i determine the speed of a cpu on AIX 4.3.3 or 5.1?

3. HP-UX

How to find CPU Speed of HP UX

Need to find the CPU speed of HP UX for a non root login. echo "itick_per_usec/D" | adb /stand/vmunix /dev/mem | tail -1 will give the following for non root users ERROR: cannot open `/dev/mem', errno = 13, Permission denied

4. Shell Programming and Scripting

egrep is very slow : How to improve performance

We have an egrep search in a while loop. egrep -w "$key" ${PICKUP_DIR}/new_update >> ${PICKUP_DIR}/update_record_new ${PICKUP_DIR}/new_update is 210 MB file In each iteration, the egrep on an average takes around 50-60 seconds to search. Ther'es nothing significant in the loop other...

5. UNIX for Advanced & Expert Users

speed test +20,000 file existance checks too slow

Need to make a very fast file existence checker. Passing in 20-50K num of files In the code below ${file} is a file with a listing of +20,000 files. test_speed is the script. I am commenting out the results of <time test_speed try>. The normal "test -f" is much much too slow when a system...

6. Shell Programming and Scripting

Help to improve speed of text processing script

Hey together, You should know, that I'am relatively new to shell scripting, so my solution is probably a little awkward. Here is the script: #!/bin/bash live_dir=/var/lib/pokerhands/live for limit in `find $live_dir/ -type d | sed -e s#$live_dir/##`; do cat $live_dir/$limit/*...

7. Red Hat

RHEL 5.6 Slow rsync to NFS array

Hi All, I have RHEL 5.6 with a 70GB local directory of Web content. Images, PHP scripts etc. I need to copy all this content to an NFS array thats mounted on the RHEL server. I did a baseline cp to copy the content one week ago. Since my baseline copy the local directory has grown by 8GB....

8. Shell Programming and Scripting

Slow Perl script: how to speed up?

I had written a perl script to compare two files: new and master and get the output of the first file i.e. the first file: words that are not in the master file STRUCTURE OF THE TWO FILES The first file is a series of names ramesh sushil jonga sudesh lugdi whereas the second file (could be...

9. Shell Programming and Scripting

Improve script - slow process with big files

Gents, Please can u help me to improve this script to be more faster, it works perfectly but for big files take a lot time to end the job.. I see the problem is in the step (while) and in this part the script takes a lot time.. Please if you can find a best way to do will be great. ...

LEARN ABOUT DEBIAN

ocf_heartbeat_rsyncd

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 					    03/09/2014						   OCF_HEARTBEAT_RSYNCD(7)