[dba-Tech] VMWare - Sharing a ramdrive on the host system

jwcolby jwcolby at colbyconsulting.com
Mon Mar 17 18:53:54 CDT 2008


Yes, but then you bump into the network speed issue.  A local ram drive has
insanely fast read speeds (2.2 gigaBYTES / second in local testing).  I have
been using a hardware RAM disk but the specific software trying to access
that is not reliably co-operating.  Strange things happen.  OTOH using a 700
mb ran drive has bumped address validation rates from an absolute maximum
ever seen of 5 million records / second (with the hardware ram drive) up to
well over 8 million records / second.  I was hoping to use a shared ram
drive just to save memory but by making the VM big enough to contain a 700
mb ram drive I can do it entirely inside of the vm with only a slight drop
in speed.


John W. Colby
Colby Consulting
www.ColbyConsulting.com 
-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Bobby Heid
Sent: Monday, March 17, 2008 5:35 PM
To: 'Discussion of Hardware and Software issues'
Subject: Re: [dba-Tech] VMWare - Sharing a ramdrive on the host system

I would think that if the RAM drive has a drive letter that you could just
treat it as a shared folder and use it like a regular shared drive.  Have
not tried it with a RAM drive though.

Bobby

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Jim Lawrence
Sent: Monday, March 17, 2008 5:23 PM
To: 'Discussion of Hardware and Software issues'
Subject: Re: [dba-Tech] VMWare - Sharing a ramdrive on the host system

The simply answer to that is. yes. The maximum amount of memory is less than
the amount for the VM... of course.

Jim 

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of jwcolby
Sent: Monday, March 17, 2008 9:30 AM
To: 'Discussion of Hardware and Software issues'
Subject: [dba-Tech] VMWare - Sharing a ramdrive on the host system

I am looking at running a VM where the software needs access to a ram drive
on the host machine.  Is this possible and how do I do it?

John W. Colby
Colby Consulting
www.ColbyConsulting.com 



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