Re: [Veritas-bu] Why SAN speed is too much slow
Are you seeing 55MB/sec to the switch but only 10MB/sec to the tape drive at the same time? If so, are you sure there is no other traffic on that HBA? Or is the backup "spiking" to 50MB/sec when it first starts and then slowing down to 10MB/sec? This is normal behavior from my perspective as buffers and command queues fill on the hardware. Have you tried running the same backup via gigabit Ethernet for test purposes? If you get the same speed over Ethernet then your SAN is probably fine. If you have the free space, create several large (50 x ~1GB ea) files and back them up. If the large files backup faster, then this issue is most likely not your SAN configuration, but your file system layout. 10MB/sec off a Windows file server with hundreds of thousands of small files is not bad from my perspective. I normally multi-stream multiple luns to get that closer to 25MB/sec. The only faster way I've found is with Flashbackup. ** Notice for Ed Wilt's management: Last time I checked, Flashbackup wasn't officially supported on Windows clusters. However, several posters here have Flashbackup working with Windows clusters. I have never tested this personally. You might also try disabling compression on the NTFS volume and formatting the volume with a larger cluster size (the bigger the better, however anything but 4KB disables compression.) Good luck! -Jonathan From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Jeff Cleverley Sent: Wednesday, March 31, 2010 11:48 PM To: VERITAS-BU@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Why SAN speed is too much slow The fact that you are getting 50 MB/s to the switch tells me that something down stream. Your server configuration is probably fine. Here are some things you can check: 1. The speed and type of the port the tape library is connected to. A speed of 10 MB/s can be caused by port mismatch for zoning. This probably will not be the problem. 2. The speed of the fibre connection to the tape drive or library. This is similar to the switch. You might be having the fibre bridge on your library hard coded to 1 gig while the switch is 2 gig. There may also be a configuration on the bridge that sets the speed to the tape drive. It could be set to a low speed. Jeff On Tue, Mar 30, 2010 at 4:49 PM, qiblatain wrote: My Netbackup server is connected to the File server via LAN. My same Netbackup server is connected to the SAN Switch via Fiber. The File server is also connected to the SAN Switch via Fiber. SAN Switch is connected to one Robot Library having shared tape drive. I have done the necessary zonning required on the SAN Switch to take the traffice on the SAN. I am able to take the backup of the File Server through SAN using Media Server. I have done all the necessary tunning & buffering in order to increase the speed, it has increased the speed but not adequate. The speed for my backups is 10 MB/S. I have checked even the performance graph on the SAN Switch. At port number 3 SAN Switch is receiving nearly 55 MB/S but suddenly it's speed lowers down at nearly 10 MB/S and start transmitting at the same speed to tape library. At other end the end from the port 5 of the SAN Switch to the Tape Libraray the speed again becomes fast. Is it possibe that the SAN Switch is not properly configured. Because I have done everything in order to increase the speed from the Netbackup end. I even have checked the console of the tape library but to no avail. Can any body guide me what are the necessary actions i can take in order to get the desired result for the SAN. I am using Windows Netbackup server 6.5.3. This Netbackup server is installed on the 2003 R2. I have made the File Server (FS02), as the second (additional) media server for SAN having version 6.5.2. The File Server (FS02) has Windows 2008. This File Server (FS02) is clustered with another File Server having name FS03. The problem for the low speed is possible due to some cluster issue? Waiting for Quick responses. +-- |This was sent by qiblat...@gmail.com via Backup Central. |Forward SPAM to ab...@backupcentral.com. +-- ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu -- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611 ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Why SAN speed is too much slow
The fact that you are getting 50 MB/s to the switch tells me that something down stream. Your server configuration is probably fine. Here are some things you can check: 1. The speed and type of the port the tape library is connected to. A speed of 10 MB/s can be caused by port mismatch for zoning. This probably will not be the problem. 2. The speed of the fibre connection to the tape drive or library. This is similar to the switch. You might be having the fibre bridge on your library hard coded to 1 gig while the switch is 2 gig. There may also be a configuration on the bridge that sets the speed to the tape drive. It could be set to a low speed. Jeff On Tue, Mar 30, 2010 at 4:49 PM, qiblatain < netbackup-fo...@backupcentral.com> wrote: > > My Netbackup server is connected to the File server via LAN. My same > Netbackup server is connected to the SAN Switch via Fiber. The File server > is also connected to the SAN Switch via Fiber. SAN Switch is connected to > one Robot Library having shared tape drive. I have done the necessary > zonning required on the SAN Switch to take the traffice on the SAN. I am > able to take the backup of the File Server through SAN using Media Server. I > have done all the necessary tunning & buffering in order to increase the > speed, it has increased the speed but not adequate. > > The speed for my backups is 10 MB/S. I have checked even the performance > graph on the SAN Switch. At port number 3 SAN Switch is receiving nearly 55 > MB/S but suddenly it's speed lowers down at nearly 10 MB/S and start > transmitting at the same speed to tape library. At other end the end from > the port 5 of the SAN Switch to the Tape Libraray the speed again becomes > fast. > > Is it possibe that the SAN Switch is not properly configured. Because I > have done everything in order to increase the speed from the Netbackup end. > I even have checked the console of the tape library but to no avail. Can any > body guide me what are the necessary actions i can take in order to get the > desired result for the SAN. > I am using Windows Netbackup server 6.5.3. This Netbackup server is > installed on the 2003 R2. I have made the File Server (FS02), as the second > (additional) media server for SAN having version 6.5.2. The File Server > (FS02) has Windows 2008. This File Server (FS02) is clustered with another > File Server having name FS03. > > The problem for the low speed is possible due to some cluster issue? > > Waiting for Quick responses. > > +-- > |This was sent by qiblat...@gmail.com via Backup Central. > |Forward SPAM to ab...@backupcentral.com. > +-- > > > ___ > Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu > -- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611 ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
[Veritas-bu] Why SAN speed is too much slow
My Netbackup server is connected to the File server via LAN. My same Netbackup server is connected to the SAN Switch via Fiber. The File server is also connected to the SAN Switch via Fiber. SAN Switch is connected to one Robot Library having shared tape drive. I have done the necessary zonning required on the SAN Switch to take the traffice on the SAN. I am able to take the backup of the File Server through SAN using Media Server. I have done all the necessary tunning & buffering in order to increase the speed, it has increased the speed but not adequate. The speed for my backups is 10 MB/S. I have checked even the performance graph on the SAN Switch. At port number 3 SAN Switch is receiving nearly 55 MB/S but suddenly it's speed lowers down at nearly 10 MB/S and start transmitting at the same speed to tape library. At other end the end from the port 5 of the SAN Switch to the Tape Libraray the speed again becomes fast. Is it possibe that the SAN Switch is not properly configured. Because I have done everything in order to increase the speed from the Netbackup end. I even have checked the console of the tape library but to no avail. Can any body guide me what are the necessary actions i can take in order to get the desired result for the SAN. I am using Windows Netbackup server 6.5.3. This Netbackup server is installed on the 2003 R2. I have made the File Server (FS02), as the second (additional) media server for SAN having version 6.5.2. The File Server (FS02) has Windows 2008. This File Server (FS02) is clustered with another File Server having name FS03. The problem for the low speed is possible due to some cluster issue? Waiting for Quick responses. +-- |This was sent by qiblat...@gmail.com via Backup Central. |Forward SPAM to ab...@backupcentral.com. +-- ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
