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November 8th, 2006 09:00
Synchronous MirrorView Distance?
We have two CX600 arrays which are 52KM apart and connected via a DWDM circuit. The circuit consists of 4 x 1Gb/s lines. Two of the lines are used for FC protocol (2 fabrics). The other two lines are used for IP protocol. We mirror our data from site 1 to site 2 using MirrorView/S.
Just wondering what the longest distance MirrorView/S would operate successfully over?
Regards
T
Just wondering what the longest distance MirrorView/S would operate successfully over?
Regards
T
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seancummins
2 Intern
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226 Posts
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November 10th, 2006 07:00
There is no easy answer for this one.. it really depends on the latency tolerance of your application. The longer the circuit is, the higher the latency on that circuit is going to be. As latency on the circuit increases, latency from an application/OS perspective will increase. If your applications start reach their latency thresholds, I/O's will start timing out and the applications will crash. Also, any packet loss on the link will cause retransmissions, which will effectively increase your latency.
If you haven't already, I would recommend that you work with your account team and go through the SVC BC (Solutions Validation Center / Business Continuity) process to validate your MV/S configuration. They will take performance data from your Clariions, perform a network assessment, and analyze that data to ensure that you have a valid solution.
Hope that helps,
- Sean