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Full Discussion: using ls -lrt instead of ls
Top Forums UNIX for Dummies Questions & Answers using ls -lrt instead of ls Post 302344075 by Corona688 on Friday 14th of August 2009 01:56:13 PM
Old 08-14-2009
The -r flag just reverses the sort, it will still have the skip. Since they're being added continuously, I'm assuming they have sequential timestamps, so if you are using GNU ls, try the --sort=time option, which will sort by time instead of filename.

The performance issue is that, if there are thousands of files -- which there probably are -- it crams them all into one shell variable before continuing. This is slow and may even truncate the list if it is too large. Try something like this instead, piping it:
Code:
ls --sort=time $SAPRESPONSEGOFILE | sed "s/go/dat/g" |
while read SAPRESPONSEFILES
do
  echo "File is ${SAPRESPONSEFILES}"
done

If the performance is too slow you could use shell string manipulation to replace go with dat and leave out sed.

If there are still performance issues with ls, then your directory is too huge, the problem is not ls in particular but rather the rapid statting and sorting of thousands of files in general.
 

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OCF_HEARTBEAT_SAPINS(7) 					OCF resource agents					   OCF_HEARTBEAT_SAPINS(7)

NAME
ocf_heartbeat_SAPInstance - Manages a SAP instance SYNOPSIS
SAPInstance [start | stop | status | monitor | promote | demote | validate-all | meta-data | methods] DESCRIPTION
Resource script for SAP. It manages a SAP Instance as an HA resource. SUPPORTED PARAMETERS
InstanceName The full qualified SAP instance name. e.g. P01_DVEBMGS00_sapp01ci (required, string, no default) DIR_EXECUTABLE The full qualified path where to find sapstartsrv and sapcontrol. (optional, string, no default) DIR_PROFILE The full qualified path where to find the SAP START profile. (optional, string, no default) START_PROFILE The name of the SAP START profile. (optional, string, no default) START_WAITTIME After that time in seconds a monitor operation is executed by the resource agent. Does the monitor return SUCCESS, the start is handled as SUCCESS. This is useful to resolve timing problems with e.g. the J2EE-Addin instance. (optional, string, default 3600) AUTOMATIC_RECOVER The SAPInstance resource agent tries to recover a failed start attempt automaticaly one time. This is done by killing runing instance processes and executing cleanipc. (optional, boolean, default false) MONITOR_SERVICES (optional, string, default disp+work|msg_server|enserver|enrepserver|jcontrol|jstart) ERS_InstanceName (optional, string, no default) ERS_START_PROFILE (optional, string, no default) PRE_START_USEREXIT The full qualified path where to find a script or program which should be executed before this resource gets started. (optional, string, no default) POST_START_USEREXIT The full qualified path where to find a script or program which should be executed after this resource got started. (optional, string, no default) PRE_STOP_USEREXIT The full qualified path where to find a script or program which should be executed before this resource gets stopped. (optional, string, no default) POST_STOP_USEREXIT The full qualified path where to find a script or program which should be executed after this resource got stopped. (optional, string, no default) SUPPORTED ACTIONS
This resource agent supports the following actions (operations): start Starts the resource. Suggested minimum timeout: 180. stop Stops the resource. Suggested minimum timeout: 240. status Performs a status check. Suggested minimum timeout: 60. monitor Performs a detailed status check. Suggested minimum timeout: 60. Suggested interval: 120. promote Promotes the resource to the Master role. Suggested minimum timeout: 320. demote Demotes the resource to the Slave role. Suggested minimum timeout: 320. validate-all Performs a validation of the resource configuration. Suggested minimum timeout: 5. meta-data Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5. methods Suggested minimum timeout: 5. EXAMPLE
The following is an example configuration for a SAPInstance resource using the crm(8) shell: primitive example_SAPInstance ocf:heartbeat:SAPInstance params InstanceName=string op monitor depth="0" timeout="60" interval="120" SEE ALSO
http://www.linux-ha.org/wiki/SAPInstance_(resource_agent) AUTHOR
Linux-HA contributors (see the resource agent source for information about individual authors) resource-agents 1.0.3 07/05/2010 OCF_HEARTBEAT_SAPINS(7)
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