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SocketMode=
If listening on a file system socket or FIFO, this option specifies the
file system access mode used when creating the file node. Takes an
access mode in octal notation. Defaults to 0666.
Thanks Alex Murray[@alexmurray], for reporting.
Fixes: #162
Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
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Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
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Add Documentation entries, cleaned up socket activation entries.
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Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
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Problem:
-------
Overall creation time of a block using targetcli is raising linearly as the
block count increase.
This is because of the recurring issue involving refresh(reload) at
multiple objects/places, as the LIO's configfs is deeply nested.
Earlier discussion of the problem statement with stats and graphs about delays:
http://bit.ly/targetcli-create-delay
Solution:
--------
Introduce a daemon component for targetcli[d] which will retain state of
Configshell object in memory, so that any new requests can directly use it,
instead of loading the storageObjects/targetObjects again.
Details about "how to use it ?":
-------------------------------
$ systemctl start targetclid
$ systemctl status targetclid
● targetclid.service - Targetcli daemon
Loaded: loaded (/usr/lib/systemd/system/targetclid.service; disabled; vendor preset: disabled)
Active: active (running) since Wed 2019-04-10 12:19:51 IST; 2h 17min ago
Main PID: 3950 (targetclid)
Tasks: 3 (limit: 4915)
CGroup: /system.slice/targetclid.service
└─3950 /usr/bin/python /usr/bin/targetclid
Apr 10 12:19:51 localhost.localdomain systemd[1]: Started Targetcli daemon.
$ targetcli help
Usage: /usr/bin/targetcli [--version|--help|CMD|--tcp]
--version Print version
--help Print this information
CMD Run targetcli shell command and exit
<nothing> Enter configuration shell
--tcp CMD Pass targetcli command to targetclid
--tcp <nothing> Enter multi-line command mode for targetclid
See man page for more information.
One line command usage:
----------------------
$ targetcli --tcp CMD
Eg:
$ targetcli --tcp pwd
/
Multiple line commands usage:
----------------------------
$ targetcli --tcp
CMD1
CMD2
.
.
CMDN
exit
Eg:
$ targetcli --tcp
^Tab
/ backstores/ iscsi/ loopback/ vhost/ xen-pvscsi/ cd
clearconfig exit get help ls pwd refresh
restoreconfig saveconfig set status
pwd
get global logfile
get global auto_save_on_exit
/ saveconfig
exit
output follows:
/
logfile=/var/log/gluster-block/gluster-block-configshell.log
auto_save_on_exit=false
Configuration saved to /etc/target/saveconfig.json
Stats with and without changes:
------------------------------
Running simple 'pwd' command after creating 1000 blocks on a node:
Without this change:
$ time targetcli pwd
/
real 0m8.963s
user 0m7.775s
sys 0m1.103s
with daemonize changes:
$ time targetcli --tcp "pwd"
/
real 0m0.126s
user 0m0.099s
sys 0m0.024s
Thanks to Maurizio for hangingout with me for all the discussions involved.
Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
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