Improve company productivity with a Business Account.Sign Up

x
?
Solved

What is interlace value in SVM ?

Posted on 2009-05-04
6
Medium Priority
?
768 Views
Last Modified: 2013-12-27
Do we use interlace value only in 'striping' or in 'mirror' also? Also I do not see 'interlace' value in 'soft partition'. Thanks!
0
Comment
Question by:beer9
  • 4
  • 2
6 Comments
 
LVL 40

Accepted Solution

by:
omarfarid earned 1000 total points
ID: 24301200
please see:

http://blogs.sun.com/tonyn/entry/svm_default_interlace_and_resync
http://docsun.cites.uiuc.edu/sun_docs/C/solaris_9/SUNWaadm/LOGVOLMGRADMIN/p15.html

from 2nd link:

"An interlace is the size, in Kbytes, Mbytes, or blocks, of the logical data segments on a stripe. Depending on the application, different interlace values can increase performance for your configuration. The performance increase comes from having several disk arms doing I/O. When the I/O request is larger than the interlace size, you might get better performance."
0
 

Author Comment

by:beer9
ID: 24307448
I created a test, stripe, concatenation and mirror, and I am able to see 'interlace' value set only in the 'concatenation'. So the interlace value is applicable to the 'concatenation' device only?
bash-3.00# metastat
d23: Mirror
    Submirror 0: d11
      State: Okay
    Submirror 1: d12
      State: Okay
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 204800 blocks (100 MB)
 
d11: Submirror of d23
    State: Okay
    Size: 204800 blocks (100 MB)
    Stripe 0:
        Device   Start Block  Dbase        State Reloc Hot Spare
        c0d1s5          0     No            Okay   Yes
 
 
d12: Submirror of d23
    State: Okay
    Size: 204800 blocks (100 MB)
    Stripe 0:
        Device   Start Block  Dbase        State Reloc Hot Spare
        c0d1s6          0     No            Okay   Yes
 
 
d10: Concat/Stripe
    Size: 147456 blocks (72 MB)
    Stripe 0: (interlace: 32 blocks)
        Device   Start Block  Dbase     Reloc
        c0d1s3      28672     Yes       Yes
        c0d1s4          0     No        Yes
 
d99: Concat/Stripe
    Size: 2048000 blocks (1000 MB)
    Stripe 0:
        Device   Start Block  Dbase     Reloc
        c0d1s0          0     No        Yes
    Stripe 1:
        Device   Start Block  Dbase     Reloc
        c0d1s1          0     No        Yes
 
Device Relocation Information:
Device   Reloc  Device ID
c0d1   Yes      id1,cmdk@AVBOX_HARDDISK=VBa4a10e74-e93db827

Open in new window

0
 
LVL 40

Expert Comment

by:omarfarid
ID: 24307553
the link talks about interlace for a stripe and I could see it for device d10
0
Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 

Author Comment

by:beer9
ID: 24311542
d10 I configured as concatenated device only...
sh-3.00# metastat -p
d23 -m d11 d12 1
d11 1 1 c0d1s5
d12 1 1 c0d1s6
d10 1 2 c0d1s3 c0d1s4 -i 32b
d99 2 1 c0d1s0 \
         1 c0d1s1

Open in new window

0
 

Author Comment

by:beer9
ID: 24332578
You are right Omar, d10 is configured as 'stripe' device not 'concatenated' device. Thank :-)
0
 

Author Closing Comment

by:beer9
ID: 31577527
Thanks Omar! :-)
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

I promised to write further about my project, and here I am.  First, I needed to setup the Primary Server.  You can read how in this article: Setup FreeBSD Server with full HDD encryption (http://www.experts-exchange.com/OS/Unix/BSD/FreeBSD/A_3660-S…
Every server (virtual or physical) needs a console: and the console can be provided through hardware directly connected, software for remote connections, local connections, through a KVM, etc. This document explains the different types of consol…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.

606 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question