Follow up to defrag validity discussion: please read
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From: Cronos on 4 Jan 2010 00:43 Not my words but wanted your input on the below: especially Rod Speed. "And then there are people who do more than write for magazines, have decades of real-world experience, who work with small systems to systems with hundreds of terra-bytes.... My experience with Windows NTFS and file fragmentation gives me 100% confidence that performance is increased when the file system is not fragmented. This holds true across single and multi-drive systems. The benefit is seen at different levels and is based on the amount of fragments, their location on the physical disk(s) and how much an app uses those files. I've seen SQL queries fail because of fragmented SQL Database files, not just fragmented indexes, but a database file with 30,000+ fragments. Same for web site performance, where an app serves PDF files and allows changes to those PDF files - 8 million PDF files, hundreds of millions of fragments in less than a years time, and random app failures as more and more users connect - a defrag completely cured the problem. On servers, depending on how many ADD/DELETES you do, they also benefit from unfragmented files, same with roaming profiles, same with a single computer reading a large (4GB file), etc.... Most people could easily get by with a yearly full defrag, with compacting space, and they would notice the difference, others may do it monthly or every 6 months..... If you've used your computer, heavily, for a year and don't notice any benefit after a full defrag and compacting then you really won't notice much else about your computer."
From: 3877 on 4 Jan 2010 02:15 Ed Light wrote: > On 1/3/2010 9:43 PM, Cronos wrote: >> Not my words but wanted your input on the below: especially Rod >> Speed. > Lots of people have Rod filtered out. I wouldn't take him seriously, nor ever read his posts. Everyone ignores yours.
From: David Brown on 4 Jan 2010 03:57 Cronos wrote: > Not my words but wanted your input on the below: especially Rod Speed. > Would these be words taken from the adverts for commercial defrag software? > > I've seen SQL queries fail because of fragmented SQL Database files, not > just fragmented indexes, but a database file with 30,000+ fragments. > Same for web site performance, where an app serves PDF files and allows > changes to those PDF files - 8 million PDF files, hundreds of millions > of fragments in less than a years time, and random app failures as more > and more users connect - a defrag completely cured the problem. > Applications know nothing about the fragmentation of files. It is conceivable, but unlikely, that fragmentation could slow down the file access and that the sql queries are failing with timeouts - other than speed, there is no way for fragmentation to influence an application. Of course, the situation would require a badly written (or badly configured) OS, and badly written (or badly configured) database server, and a system so overloaded that it is on the verge of collapse anyway. And of course almost no one with any knowledge or experience would run a huge database on an NTFS file system. There are good reasons why big serious databases use direct disk IO rather than going through an operating system's file system layers, or at least run on an operating system and file system suitable for such server applications.
From: Cronos on 4 Jan 2010 18:32 Ed Light wrote: > On 1/3/2010 9:43 PM, Cronos wrote: >> Not my words but wanted your input on the below: especially Rod Speed. > Lots of people have Rod filtered out. I wouldn't take him seriously, nor > ever read his posts. Wasn't just Rod but a few other people in this group claimed defrag is never needed too but he is the one peson in this group who I have seen state it many times over the years and I think he is FOS and is giving bad advice.
From: Cronos on 4 Jan 2010 18:38
David Brown wrote: > Cronos wrote: >> Not my words but wanted your input on the below: especially Rod Speed. >> > > Would these be words taken from the adverts for commercial defrag software? Nope. They are from a poster in another Usenet group when the subject came up. He said he didn't want to get involved in a flamewar here so I am posting what he said anonymously and will post the replies back to him. I like a good flamewar, myself. |