Re: Best practice for linux backup
In my experience the defaults give far from the best performance. Ofcourse, this always depends on the actual configuration, and the only way to get the best performance is to test your environment. Setting hi receive and transmit windows in Linux usually gives some speed, and uselargebuffers/largecommbuffers/tcpnodelay in dsm.sys often gives speed improvements. As I recall tcpwindowsize is maxed at 128 in Linux and tcpbuffsize 512. txngroupmax gives speed improvement and should be changed depending on if your'e sending directly to tape or disk. The most important thing is ofcourse trying to use as many sessions as possible (resourceutilization). Try breaking up large filesystems with virtualmountpoints. For more tips, check out IBM's performance tuning guide at http://publib.boulder.ibm.com/tividd/td/TSMM/SC32-9101-01/en_US/HTML/SC32-9101-01.htm Theres also alot of guides for tuning Linux sysctls out there. -David -- David Hendén Exist AB, Sweden Hougaard.Flemming FHG [EMAIL PROTECTED] Sent by: ADSM: Dist Stor Manager ADSM-L@VM.MARIST.EDU 2006-02-10 00:44 Please respond to ADSM: Dist Stor Manager ADSM-L@VM.MARIST.EDU To ADSM-L@VM.MARIST.EDU cc Subject Best practice for linux backup Hi all Anyone got any ideas for a best practice for backup of linux servers to increase performance?? Typically the backup will be done over WAN links of 2-100 Mbit. I'm thinking TCPWINDOWSIZE, TCPBUFFSIZE etc... is the default values good enough? Or do I have to fine tune here? Regards Flemming ___ www.kmd.dk www.kundenet.kmd.dk www.eboks.dk www.civitas.dk www.netborger.dk www.organisator.dk Hvis du har modtaget denne mail ved en fejl vil jeg gerne, at du informerer mig og sletter den. KMD skaber it-services, der fremmer effektivitet hos det offentlige, erhvervslivet og borgerne. If you received this e-mail by mistake, please notify me and delete it. Thank you. Our mission is to enhance the efficiency of the public sector and improve its service of the general public.
Re: Best practice for linux backup
ADSM: Dist Stor Manager ADSM-L@VM.MARIST.EDU wrote on 02/09/2006 05:44:54 PM: Anyone got any ideas for a best practice for backup of linux servers to increase performance?? Typically the backup will be done over WAN links of 2-100 Mbit. I'm thinking TCPWINDOWSIZE, TCPBUFFSIZE etc... is the default values good enough? Or do I have to fine tune here? Please refer to the TSM Tuning and Performance Guide, which can be found in links off the main TSM support page on the IBM site. -- Mark Stapleton ([EMAIL PROTECTED]) MR Backup and Recovery Management 262.790.3190 -- Electronic Privacy Notice. This e-mail, and any attachments, contains information that is, or may be, covered by electronic communications privacy laws, and is also confidential and proprietary in nature. If you are not the intended recipient, please be advised that you are legally prohibited from retaining, using, copying, distributing, or otherwise disclosing this information in any manner. Instead, please reply to the sender that you have received this communication in error, and then immediately delete it. Thank you in advance for your cooperation. ==
Re: Best practice for linux backup
there's some linux tcp tuning info here... http://www.acc.umu.se/%7Emaswan/linux-netperf.txt [EMAIL PROTECTED] 2/9/2006 5:44:54 PM Hi all Anyone got any ideas for a best practice for backup of linux servers to increase performance?? Typically the backup will be done over WAN links of 2-100 Mbit. I'm thinking TCPWINDOWSIZE, TCPBUFFSIZE etc... is the default values good enough? Or do I have to fine tune here? Regards Flemming ___ www.kmd.dk www.kundenet.kmd.dk www.eboks.dk www.civitas.dk www.netborger.dk www.organisator.dk Hvis du har modtaget denne mail ved en fejl vil jeg gerne, at du informerer mig og sletter den. KMD skaber it-services, der fremmer effektivitet hos det offentlige, erhvervslivet og borgerne. If you received this e-mail by mistake, please notify me and delete it. Thank you. Our mission is to enhance the efficiency of the public sector and improve its service of the general public. Confidentiality Notice follows: The information in this message (and the documents attached to it, if any) is confidential and may be legally privileged. It is intended solely for the addressee. Access to this message by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken, or omitted to be taken in reliance on it is prohibited and may be unlawful. If you have received this message in error, please delete all electronic copies of this message (and the documents attached to it, if any), destroy any hard copies you may have created and notify me immediately by replying to this email. Thank you.
