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sanman1960
11 Posts
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1685
June 26th, 2017 11:00
VPLEX Extent Mobility Migration speed/sizes
I found some confusing info regarding the speed settings on Extent Mobility Migration. In a table is shows:
Transfer Speed (GUI) transfer-size attribute (CLI)
Lowest (default) ----------- 128 KB
Low ---------------------- 2 MB
Medium ----------------- 8 MB
High ---------------------- 16 MB
Highest -------------------- 32 MB
However it gets somewhat confusing when in same doc it show this;
The Transfer-size is the CLI equivalent of the Transfer Speed in Unisphere. It is the region of a
source element that is temporarily locked, read, and written on the target. Transfer-size can be as
small as 40 KB, as large as 128 MB, and must be a multiple of 4 KB.
Is the minimum 40K or 128K and the maximum either 32MB or 128MB?
Thanks in advance.
sathyaprakash.mohandass
41 Posts
1215
0
Posted July 24th, 2017 07:00
The Configurable transfer size or speed is between 40k to 128M. the default is 128k. However the transfer size or speed is only a upper limit. The migrations or rebuilds are priority 2 jobs for VPlex always. Only the system decides the speed based on the I/O. And high speed limit impacts the performance to some extent.
sanman1960
11 Posts
1215
0
Posted June 26th, 2017 12:00
Turns out it's simply the GUI versus CLI capability...please correct if mistaken.