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Full Discussion: Solaris Volume Manger - Database Replicas Question - Benefits of Increasing Default Size?
Operating Systems Solaris Solaris Volume Manger - Database Replicas Question - Benefits of Increasing Default Size? Post 302506132 by Keepcase on Friday 18th of March 2011 03:29:47 PM
Old 03-18-2011
Solaris Volume Manger - Database Replicas Question - Benefits of Increasing Default Size?
Hey all!

I was hoping someone knew anything about this one...
I know with Solaris Volume Manager the default Database Replica size is 8192 blocks (4MB approximately)

Now I know you can increase this amount but is there any point?
The reason I am asking this is that I've setup mirroring on our jumpstart client and everything boots fine, but I noticed in the profile options...

Code:
install_type     initial_install
system_type      standalone
cluster          SUNWCXall
filesys          mirror:d10 c0t2d0s0 c0t3d0s0 free /
filesys          mirror:d20 c0t2d0s1 c0t3d0s1 2048 swap
metadb           c0t2d0s5 size 8192 count 2
metadb           c0t3d0s5 size 8192 count 2

I cannot specify a specific slice size then throw the metadb on top automatically through jumpstart; with the above profile settings what happens is that the system will have approximately 8MB in slice 5

I noticed with our initial setups in our environment that we have 50MB (is this just overkill?)

So going back to my topic name; I was wondering if anyone knew a reason as to why someone would need to increase the default size of the database replica and if there were any benefits.

Our current environment is also 50MB in slice5 (which is setup in our default jumpstart client setup; I've begun to wonder if this is unncessary)

Thanks for any help guys! (and gals!)
 

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LEARN ABOUT SUSE

ibcm

ibcm(7D)							      Devices								  ibcm(7D)

NAME
       ibcm - Solaris InfiniBand Communication Manager

DESCRIPTION
       The  Solaris InfiniBand Communication Manager (IBCM) is a Solaris kernel misc module that adheres to the InfiniBand Architecture Specifica-
       tion, Volume 1: Release 1.1 for InfiniBand Communication Management Class.

       IBCM provides a transport layer abstraction to IB clients to set up reliable connected channels along with  service,  multicast,  and  path
       lookup-related  functionality.  IBCM implements the CM protocol as per the InfiniBand Architecture Specification, Volume 1: Release 1.1 and
       utilizes the InfiniBand Management Framework module for all IB management-related functionality and the	InfiniBand  Transport  Layer  (see
       ibtl(7D)) for all IB Verbs-related functionality.

FILES
       /kernel/misc/ibcm

	   32-bit x86 ELF kernel module

       /kernel/misc/amd64/ibcm

	   64-bit x86 ELF kernel module

       /kernel/misc/sparcv9/ibcm

	   64-bit SPARC ELF kernel module

ATTRIBUTES
       See attributes(5) for a description of the following attribute:

       +-----------------------------+-----------------------------+
       |ATTRIBUTE TYPE		     |ATTRIBUTE VALUE		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     | Consolidation Private	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWhea			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       attributes(5), ibtl(7D)

       InfiniBand Architecture Specification, Volume 1: Release 1.1

SunOS 5.10							    2 Apr 2004								  ibcm(7D)
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