Re: [spamdyke-users] Reducing hard disk usage
Well sort of... With ZFS this happens automatically because the file information is cached in the ARC RAM unless forced out. I'm currently running a 91% cache hit rate on this server which runs file, web, streaming, and mail services. It's running OpenIndiana (hipster) and has 4G RAM with 4 TB mirrored disk space (half full). On 10/31/2013 11:44 AM, BC wrote: Does anyone use some sort of RAMdisk or memory disk to hold the graylist? I just did a 'du' on my graylist and it takes up 85mb of space. I'm trying to reduce the amount of hard drive accesses going on. ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
Re: [spamdyke-users] Reducing hard disk usage
> Does anyone use some sort of RAMdisk or memory disk to hold the greylist We don't greylist. But all external (receiving only) Frontend Servers Mailers are running in Ramdisks. This gives extremely good results espacially when receiving extreme high amounts of incoming Mails.. If rebooting one of these Servers there are init Scripts that copy 1:1 all Files, empty Queues and so on from a Master at a Harddisk to the Ramdisk. Lutz Petersen ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
Re: [spamdyke-users] Reducing hard disk usage
You actually answered another question I had as well. I noticed in my latest server-build, that the 'top' command shows an additional line that I'd not seen on the previous server: Mem: 36M Active, 29M Inact, 206M Wired, 5647M Free ARC: 59M Total, 12M MFU, 45M MRU, 32K Anon, 587K Header, 1766K Other Swap: 2048M Total, 2048M Free That must be the ARC to which you make reference, yes? but despite having 6GB RAM here, I'm hearing the hard drive doing a lot of logging, and the boot drive is booted into zfs. So it doesn't seem that much is being retained in the ARC RAM. Is there a specific way that you turn that function 'on'? On 11/1/2013 11:00 AM, spamdyke-users-requ...@spamdyke.org wrote: With ZFS this happens automatically because the file information is cached in the ARC RAM unless forced out. I'm currently running a 91% cache hit rate on this server which runs file, web, streaming, and mail services. It's running OpenIndiana (hipster) and has 4G RAM with 4 TB mirrored disk space (half full). ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
Re: [spamdyke-users] Reducing hard disk usage
You are doing what I want to do. Which RAMdisk program are you running? Do you have a script that flushes the RAMdisk contents to disk periodically, so the info on the hard disk doesn't get too stale between reboots? Could you share your init Script(s) with me? Thank you. On 11/1/2013 11:00 AM, spamdyke-users-requ...@spamdyke.org wrote: We don't greylist. But all external (receiving only) Frontend Servers Mailers are running in Ramdisks. This gives extremely good results espacially when receiving extreme high amounts of incoming Mails.. If rebooting one of these Servers there are init Scripts that copy 1:1 all Files, empty Queues and so on from a Master at a Harddisk to the Ramdisk. ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
Re: [spamdyke-users] Reducing hard disk usage
The other question I forgot to ask... With zfs and 4G RAM running, the prefetch is automatically disabled. Did you make the loader.conf change to enable prefetch caching anyway? Thanks. On 11/1/2013 11:00 AM, spamdyke-users-requ...@spamdyke.org wrote: With ZFS this happens automatically because the file information is cached in the ARC RAM unless forced out. I'm currently running a 91% cache hit rate on this server which runs file, web, streaming, and mail services. It's running OpenIndiana (hipster) and has 4G RAM with 4 TB mirrored disk space (half full). ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
Re: [spamdyke-users] Reducing hard disk usage
Prefetch is evil and is disabled by default in illumos based distributions (in newer versions it is enabled for scrubs since these are sequential in nature and can get a performance boost). I'm talking about the Adaptive Replacement Cache (ARC). This uses various metrics such as lru to determine what to keep in RAM. As long as there is enough RAM, it will keep things cached forever. On 11/01/2013 03:02 PM, BC wrote: The other question I forgot to ask... With zfs and 4G RAM running, the prefetch is automatically disabled. Did you make the loader.conf change to enable prefetch caching anyway? Thanks. On 11/1/2013 11:00 AM, spamdyke-users-requ...@spamdyke.org wrote: With ZFS this happens automatically because the file information is cached in the ARC RAM unless forced out. I'm currently running a 91% cache hit rate on this server which runs file, web, streaming, and mail services. It's running OpenIndiana (hipster) and has 4G RAM with 4 TB mirrored disk space (half full). ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
Re: [spamdyke-users] Reducing hard disk usage
I can see I have some reading to do. Thanks. On 11/1/2013 1:32 PM, Gary Gendel wrote: Prefetch is evil and is disabled by default in illumos based distributions (in newer versions it is enabled for scrubs since these are sequential in nature and can get a performance boost). I'm talking about the Adaptive Replacement Cache (ARC). This uses various metrics such as lru to determine what to keep in RAM. As long as there is enough RAM, it will keep things cached forever. On 11/01/2013 03:02 PM, BC wrote: The other question I forgot to ask... With zfs and 4G RAM running, the prefetch is automatically disabled. Did you make the loader.conf change to enable prefetch caching anyway? Thanks. On 11/1/2013 11:00 AM, spamdyke-users-requ...@spamdyke.org wrote: With ZFS this happens automatically because the file information is cached in the ARC RAM unless forced out. I'm currently running a 91% cache hit rate on this server which runs file, web, streaming, and mail services. It's running OpenIndiana (hipster) and has 4G RAM with 4 TB mirrored disk space (half full). ___ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
