Re: recommended memory for zfs

2013-05-10 Thread Ronald Klop
On Fri, 10 May 2013 04:18:42 +0200, Benjamin Adams benjamindad...@gmail.com wrote: On 05/09/2013 10:06 PM, Jeremy Chadwick wrote: On Thu, May 09, 2013 at 09:47:27PM -0400, Benjamin Adams wrote: On 05/09/2013 08:53 PM, Shane Ambler wrote: On 09/05/2013 22:48, Benjamin Adams wrote: Hello

Re: recommended memory for zfs

2013-05-10 Thread Daniel Kalchev
On May 10, 2013, at 1:08 PM, Ronald Klop ronald-freeb...@klop.yi.org wrote: On Fri, 10 May 2013 04:18:42 +0200, Benjamin Adams benjamindad...@gmail.com wrote: On 05/09/2013 10:06 PM, Jeremy Chadwick wrote: On Thu, May 09, 2013 at 09:47:27PM -0400, Benjamin Adams wrote: On 05/09/2013

recommended memory for zfs

2013-05-09 Thread Benjamin Adams
Hello zfs question about memory. I heard zfs is very ram hungry. Service looking to run: - nginx - postgres - php-fpm - python I have a machine with two quad core cpus but only 4 G Memory I'm looking to buy more ram now. What would be the recommend amount of memory for zfs across 6 drives on

Re: recommended memory for zfs

2013-05-09 Thread Tom Evans
On Thu, May 9, 2013 at 2:18 PM, Benjamin Adams benjamindad...@gmail.com wrote: Hello zfs question about memory. I heard zfs is very ram hungry. Service looking to run: - nginx - postgres - php-fpm - python I have a machine with two quad core cpus but only 4 G Memory I'm looking to buy

Re: recommended memory for zfs

2013-05-09 Thread Florent Peterschmitt
Le 09/05/2013 15:18, Benjamin Adams a écrit : Hello zfs question about memory. I heard zfs is very ram hungry. Service looking to run: - nginx - postgres - php-fpm - python I have a machine with two quad core cpus but only 4 G Memory I'm looking to buy more ram now. What would be the

Re: recommended memory for zfs

2013-05-09 Thread Dan Nelson
In the last episode (May 09), Benjamin Adams said: Hello zfs question about memory. I heard zfs is very ram hungry. Service looking to run: - nginx - postgres - php-fpm - python I have a machine with two quad core cpus but only 4 G Memory I'm looking to buy more ram now. What would

Re: recommended memory for zfs

2013-05-09 Thread Shane Ambler
On 09/05/2013 22:48, Benjamin Adams wrote: Hello zfs question about memory. I heard zfs is very ram hungry. Service looking to run: - nginx - postgres - php-fpm - python I have a machine with two quad core cpus but only 4 G Memory I'm looking to buy more ram now. What would be the recommend

Re: recommended memory for zfs

2013-05-09 Thread Benjamin Adams
On 05/09/2013 08:53 PM, Shane Ambler wrote: On 09/05/2013 22:48, Benjamin Adams wrote: Hello zfs question about memory. I heard zfs is very ram hungry. Service looking to run: - nginx - postgres - php-fpm - python I have a machine with two quad core cpus but only 4 G Memory I'm looking to buy

Re: recommended memory for zfs

2013-05-09 Thread Jeremy Chadwick
On Thu, May 09, 2013 at 09:47:27PM -0400, Benjamin Adams wrote: On 05/09/2013 08:53 PM, Shane Ambler wrote: On 09/05/2013 22:48, Benjamin Adams wrote: Hello zfs question about memory. I heard zfs is very ram hungry. Service looking to run: - nginx - postgres - php-fpm - python I have a

Re: recommended memory for zfs

2013-05-09 Thread Adam Vande More
Probably the simplest answer is that you already have sufficient memory to run ZFS. As someone already mentioned you should use AMD64, not i386. If your setup isn't fast enough with tuning, add more if it's the bottleneck. On Thu, May 9, 2013 at 8:47 PM, Benjamin Adams benjamindad...@gmail.com

Re: recommended memory for zfs

2013-05-09 Thread Adam Vande More
On Thu, May 9, 2013 at 9:06 PM, Jeremy Chadwick j...@koitsu.org wrote: The advice of 1GB of RAM per 1TB of disk space is absolute nonsense on numerous levels -- whoever gave this advice to Shane either has no understanding of how filesystems/ZFS works, or does but chose to simplify to the

Re: recommended memory for zfs

2013-05-09 Thread Benjamin Adams
On 05/09/2013 10:06 PM, Jeremy Chadwick wrote: On Thu, May 09, 2013 at 09:47:27PM -0400, Benjamin Adams wrote: On 05/09/2013 08:53 PM, Shane Ambler wrote: On 09/05/2013 22:48, Benjamin Adams wrote: Hello zfs question about memory. I heard zfs is very ram hungry. Service looking to run: -

Re: recommended memory for zfs

2013-05-09 Thread Freddie Cash
And the rule of thumb for dedupe was approx 1 GB of ARC per unique TB of data in the pool (above and beyond your normal ARC requirements). Not 1 GB of RAM per TB of disk in the pool. Very big difference between the two. :) On 2013-05-09 7:14 PM, Adam Vande More amvandem...@gmail.com wrote: On