i would like to add few more points while designing a NAS solution 1.writing of data on to HDD should be fast enough, at time when you are mounting central storage on multiple server the concurrent NFS operation makes it very difficult and the write on the box slows down e.g netapp uses wafl filesystem (or for that matter all NAS storage uses the same way of writing through cache) which does the writing of data from cache. Your solution should be based on using the cache to the maximum for both read and write. I have seen xfs,ext3 going down in the load condition.
2. You will have to check the boot time of your NAS box and it should be under control there are NAS boxes ( i would not put the name here, but you can easily find it out) which takes 15-20 minutes to boot. The box should be able to boot in 3-4 minutes even if it a abnormal reboot. 3.you should benchmark your NFS box for NFS operation not I/O operation on disk. You may get good I/O on disk but may not be able to get good NFS operation. 4.The redundancy of storage array should not be limited to RAID5 because now the storage capacity of individual disks are going high (500GB SATA, 300GB SCSI and FCAL are in the market) you should be able to handle dual disk failure in the same RAID group lets say you have 14 disk RAID group and your one disk failed and rebuilding is going on (which will take some time as the capacity is more) and during that time if your second disk also fails then your whole of the RAID volume will go offline, you should have dual parity kind of solution. 5.NAS solution should be modular i.e i should be able to add storage and processing both e.g if i am handling n NFS operation using one NAS header today with NTB storage and tomorrow if i want to increase my NFS operation i should be able to add more processing (NAS header to the same storage) and lets say i don't want to increase the NFS operation but i want to add more storage i should be able to do that as well and that too "on the fly" because if my box is in production i cant shut it down. May be there are other things also can be considered and included but that is all i could put down off hand. When ever you are ready with your NAS solution i could be a good customer for you :). also read on onstor while designing the solution. Regds Manish -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of ramana Sent: Saturday, January 14, 2006 10:15 AM To: The Linux-Delhi mailing list Subject: Re: [ilugd] NAS idea Mithun Bhattacharya <[EMAIL PROTECTED]> wrote: --- ramana wrote: > By the way, there is nothing like 'lack of resources' and there is > nothing like you can not beat world top b-school bean counters in > business systems -- if you have that desire. I am hoping you have been encouraging in in your email :). As for targetting business users - I am not against it but I would prefer to first see what hurdles I encounter in the proof of concept. I agree running a business is a different ball game but then I can also see that there is ample scope for starting one considering the competition in India is almost non existant because of the price factor. Yep. I am encouraging you and I speak positively. Your last point is the best one. India is still not touched in many areas and I see many times whenever I step outside. People who has the courage can take advantage of this. Regards ramana -- http://www.livejournal.com/users/evramana/ mail: ramana at intraperson dot com http://www.intraperson.com --------------------------------- Yahoo! Photos Ring in the New Year with Photo Calendars. Add photos, events, holidays, whatever. _______________________________________________ ilugd mailinglist -- ilugd@lists.linux-delhi.org http://frodo.hserus.net/mailman/listinfo/ilugd Archives at: http://news.gmane.org/gmane.user-groups.linux.delhi http://www.mail-archive.com/ilugd@lists.linux-delhi.org/ _______________________________________________ ilugd mailinglist -- ilugd@lists.linux-delhi.org http://frodo.hserus.net/mailman/listinfo/ilugd Archives at: http://news.gmane.org/gmane.user-groups.linux.delhi http://www.mail-archive.com/ilugd@lists.linux-delhi.org/
