Highlighted
3 Silver

Need help with symstat output

Jump to solution


HI,

For below command, Im trying to understand which is the active cycle, Is it Capture/Apply or Transmit/Recieve? Please help to understand

C:\>symstat -i 5 -type cycle -g WIN_HOAPPSQLDB1 -RepType rdfa

SRDF/A Session Cycle Summary Information

Symmetrix ID  : XXXXXXXXXX
Timestamp     : 16:23:38

                         Session    Cycle Time  (sec)        Cycle Size
                       ----------- ------------------- -----------------------
                  RA   FLGS Active               Last
Device Group Name Grp  TAS  Cycle# Min Avg Last Switch Active  Inact   Shared
----------------- ---  ---- ------ --- --- ---- ------ ------- ------- -------
WIN_HOAPPSQLDB1    31  1YA   42397  15  15   15      7       2       0       0

Legend for Session Flags:

  T(ype)          : 1 = RDF1, 2 = RDF2
  A(SYNC)         : Y = Yes, N = No
  S(tatus)        : A = Active, I = Inactive, - = N/A

Legend for the Attribute of Cycle Size:

  RDF1: Active = Capture  Inactive = Transmit
  RDF2: Active = Apply    Inactive = Receive

Labels (1)
0 Kudos
1 Solution

Accepted Solutions
Highlighted
3 Zinc

Re: Need help with symstat output

Jump to solution

Scott is correct here.  And for further information the statistics from symstat are also discussed in the array management cli guide https://support.emc.com/docu46983_Solutions_Enabler_Symmetrix_Array_Management_CLI__7.6_Product_Guid...

You have a full explanation on Page 266 on this particular output

View solution in original post

0 Kudos
4 Replies
Highlighted

Re: Need help with symstat output

Jump to solution

Your example is from the source '1' side (RDF-1). Therefore the active cycle is capturing host writes into cache. The inactive cycle refers to the period of transmitting across the link.

If you were doing symstat against the Target Array (RDF-2), 'Active' would refer to writing data to the R2 device , and 'Inactive' would be receiving data from the link.

0 Kudos
Highlighted
3 Zinc

Re: Need help with symstat output

Jump to solution

Scott is correct here.  And for further information the statistics from symstat are also discussed in the array management cli guide https://support.emc.com/docu46983_Solutions_Enabler_Symmetrix_Array_Management_CLI__7.6_Product_Guid...

You have a full explanation on Page 266 on this particular output

View solution in original post

0 Kudos
Highlighted
3 Silver

Re: Need help with symstat output

Jump to solution

Thanks Paul, the guide was helpful, But what i really want to understand is ,

When the R1 symm is capturing data for say 15 sec cycle time, Is the transmit happening at the same time for previous capture cycle, or does it happen once Capture is complete.

0 Kudos
Highlighted
Anonymous
Not applicable

Re: Need help with symstat output

Jump to solution

Hi a-j

Yes, when the R1 symm is capturing data the transmit happening at the same time for previous capture cycle.

Regards

Evan

0 Kudos