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Need to prep a chart of SRDF/A data lag
We have a SRDF/A setup replicating a bunch of Device groups in consistent mode.
The cycle used is the deafult 30 secs.
I am looking to gather data every 15 mins for, the Lag between R1 & R2 (in terms of Time, in terms of Data).
I know roughly the RPO would be around 2XCycle time, but I would like to be able to put across a graph of different values of "Data Lag" at different points of the day, and then plot these graphs for say a week or a month, and then look at the pattern for the Maximum, Minimum, and Average values of the Data Lag....to get a better picture of How much actual Data Loss we will incur if at any point of the day the Main site goes down.
Any help or direction to certain docs would be appreciated much.
Thanks Team
Sarwar
javydxplorer
18 Posts
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May 17th, 2012 03:00
Thanks.
I am putting a script to schedule it every 5 mins in the SYMCLI host, and send the output into a text file, which I would use to plot a grpah.
the symdg show , also shows the R2-R1 lag, is it the Avg of all the devs in the group ?, will it be better for me to take the outputs of each device, and plot it..?
anoopcr
148 Posts
0
May 17th, 2012 03:00
symdev show on the R1 volume shows the R1 R2 time lag.Check the RDFA information from show command
RDFA Information:
{
Session Number : 15
Cycle Number : 60767
Number of Devices in the Session : 10
Session Status : Active
Consistency Exempt Devices : No
Write Pacing Exempt Devices : No
Session Consistency State : Enabled
Minimum Cycle Time : 00:00:30
Average Cycle Time : 00:00:31
Duration of Last cycle : 00:00:31
Session Priority : 33
Tracks not Committed to the R2 Side: 0
Time that R2 is behind R1 : 00:00:59
R2 Image Capture Time : Thu May 17 06:06:50 2012
R2 Data is Consistent : True
R1 Side Percent Cache In Use : 0
R2 Side Percent Cache In Use : 0
SKT2
1.3K Posts
0
May 17th, 2012 13:00
when a dg is in consistency enabled state all the devices will be in same lag level. That is why -cons_exempt flag is famous .