Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Chris Murphy
On Wed, Aug 19, 2015 at 4:47 AM, Leon Fauster wrote: > furthermore check the fs alignment with > the underlying disk ... This is very important. Certain workloads and certain AF drive firmware can really suck when there's a lot of read,modify,write done by the drive (internally) if the fs block

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Chris Murphy
On Tue, Aug 18, 2015 at 9:38 PM, Jatin Davey wrote: > I have a few queries with respect to the block size being set in the system: > > 1. Is 4k the optimum block size considering the amount of writes / second > the application performs ? > > 2. How do i find out the optimum block size given the a

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Michael Hennebry
On Wed, 19 Aug 2015, Jatin Davey wrote: On 8/19/2015 1:54 PM, John Hodrien wrote: On Wed, 19 Aug 2015, Jatin Davey wrote: We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when our applicat

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Jatin Davey
On 8/19/2015 4:17 PM, Leon Fauster wrote: Am 19.08.2015 um 10:24 schrieb John Hodrien : On Wed, 19 Aug 2015, Jatin Davey wrote: Hi All We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Jatin Davey
On 8/19/2015 1:54 PM, John Hodrien wrote: On Wed, 19 Aug 2015, Jatin Davey wrote: Hi All We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when our application operates at a certain load i

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Leon Fauster
Am 19.08.2015 um 10:24 schrieb John Hodrien : > On Wed, 19 Aug 2015, Jatin Davey wrote: > >> Hi All >> >> We use CentOS 6.6 for our application. I have profiled the application and >> find that we have a heavy requirement in terms of Disk writes. On an average >> when our application operates a

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread John Hodrien
On Wed, 19 Aug 2015, Jatin Davey wrote: Hi All We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when our application operates at a certain load i can observe that the disk writes / second i

[CentOS] Optimum Block Size to use

2015-08-18 Thread Jatin Davey
Hi All We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when our application operates at a certain load i can observe that the disk writes / second is around 2 Mbps (Average). The block siz