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FAST on Symmetrix VMAX
We have just had our Symmetrix VMAX installed and have configured FAST for a few Storage Groups.
How do we actually see the changes and affects of FAST?
If you go to the array > FAST > FAST Control Parameters > Swap/Move History in SMC nothing shows up?
If you click on analysis you get a web page pop up for the following link https://localhost:8443/sem//OptimizerReports/HistoricalReportFiles/REPORT.HTM
The report does not show and gives a 404 error.
How can you actually see if FAST is actually being used?
Thanks
John
RobertDudley
448 Posts
0
July 27th, 2011 06:00
If you look at any device that is in a storage group under fast control you will see a new tab which will show you how much data of that device is in what tier.
vijay861
51 Posts
0
July 27th, 2011 07:00
Try this on SYMCLI host.
symfast -sid XXXX show -association -sg Prod1_SG
Symmetrix ID : XXXX
Storage Group : Prod1_SG
{
---------------------------------------------------------------
Policy Dsk Dsk Cap
Sym Protection Tier Name Grp Group Name Tech (GB)
---- ------------ ------------- ---- -------------- ----- -----
0120 RAID-1 R1_300GB_FC 020 FC_300GB_15K_* FC 10
0121 RAID-1 R1_300GB_FC 020 FC_300GB_15K_* FC 10
0122 RAID-1 R1_300GB_FC 020 FC_300GB_15K_* FC 10
0123 RAID-1 R1_300GB_FC 020 FC_300GB_15K_* FC 10
0124 RAID-1 R1_300GB_FC 020 FC_300GB_15K_* FC 10
0125 RAID-1 R1_300GB_FC 020 FC_300GB_15K_* FC 10
0126 RAID-1 R1_300GB_FC 020 FC_300GB_15K_* FC 10
0127 RAID-1 R1_300GB_FC 020 FC_300GB_15K_* FC 10
0128 RAID-1 R1_300GB_FC 020 FC_300GB_15K_* FC 10
0129 RAID-1 R1_300GB_FC 020 FC_300GB_15K_* FC 10
}
Policy Name : Platinum
Priority : 2
Tiers(3)
{
------------------------------------------------------------
Max SG Target
Tier Name Percent Tech Protection
--------------------------------- ------- ----- ------------
R53_200GB_EFD 40 EFD RAID-5(3+1)
R1_300GB_FC 40 FC RAID-1
R614_1TB_SATA 20 SATA RAID-6(14+2)
JohnDavey1
7 Posts
0
July 27th, 2011 07:00
My output is:
C:\symfast -sid ++++ show -association -sg SG_TEST
Symmetrix ID : ++++++++++++
Storage Group : SG_TEST
Thin Devices(4)
{
--------------------------------------------------
Flags Dev Total Bound Allocated
Sym P Emul Tracks Pool Name Tracks
---- ----- ----- ---------- ------------ ---------
01E5 N FBA 819750 VP_Tier1 819108
01E6 N FBA 819750 VP_Tier1 819072
01ED N FBA 16500 VP_Tier3 276
01EE N FBA 16500 VP_Tier3 216
Total ---------- ---------
Tracks 1672500 1638672
GBs 102 100
}
Policy Name : Silver
Priority : 2
Tiers(2)
{
------------------------------------------------------------------
Max SG Target
Tier Name Type Percent Tech Protection
-------------------------------- ---- -------- ----- -------------
FC_RAID-5_3plus1_VP_1 VP 100 FC RAID-5(3+1)
SATA_RAID-6_6plus2_VP_1 VP 100 SATA RAID-6(6+2)
}
Legend:
Tier Type: DP = Disk Group Provisioning, VP = Virtual Pools
Flags:
(P)inned : Y = Device is Pinned, N = Device is not Pinned
JohnDavey1
7 Posts
0
July 27th, 2011 07:00
Yes I see an extra Tab but doesnt look different from when FAST was enabled?
vijay861
51 Posts
0
July 27th, 2011 08:00
Have you got answer for your question ??
JohnDavey1
7 Posts
0
July 27th, 2011 13:00
No not really, I was expecting to see changes in the swap move history? Not sure how you know it is working? We were told that after you set it up you can have it so it analyses first then you can see what it wants to move between the tiers? Understand that it will be automatic but knowing what has actually moved to what tier.
johncampbell1
52 Posts
0
July 28th, 2011 07:00
I recall we wondered about something similar, when we hadn't set up a MTW (Move time window) entry, other than the default MTW which is disallowed.
When we created a new MTW entry which was allowed and inclusive (anytime) we've started seeing some movement across our virtual pools.
Worth a check perhaps ?
John
Rich15_ca72de
25 Posts
0
February 5th, 2015 09:00
Hi,
The recommendation is to have both the Data Collection and Data Movement time windows for FAST/VP bet set to 24/7. There is no good reason to prevent promotion if the host becomes active. You would be introducing performance problems that could have been prevented.
Rich15_ca72de
25 Posts
0
February 5th, 2015 09:00
Hi,
I think you are thinking about the original FAST or Symm Optimizer. That was a analyze and move process that happened over several days and moves were planned and approved.
FAST VP is completely different. It is a real-time process which is moving small extents all the time that the move time window is open. You cannot see each of these moves since they are small and dynamic. The way to see the movement itself is within Unisphere using the Virtual Pools in Performance section. You will see two metrics: ingress / egress. Both are tracks per second that are moved by Fast either into or out of that pool. So for example, the ingress to FC would probably be the egress from SATA as extents get promoted.
As shown above, you can always see exactly where a TDEV lives right now, how many tracks in each pool. FAST VP was never intended to need any customer approval or management nor will it provide extent level history.
EMC recommends that the Collection and Movement Time windows for FAST/VP be set to 24/7 since there is no reason to prevent a promotion from happening if the host is active.