Am 19.01.2011 08:11, schrieb Wolfgang Denk: > Dear Roberto Spadim, > > In message <AANLkTi=v6yA_0OOfi2ymA67X0x+KsvV9VC5OgG+0DvKq@xxxxxxxxxxxxxx> you wrote: >> maybe removing hwraid and using swraid may reduce speed (depend how >> much cpu you use with hw and with sw) >> what we can optimize? less I/O per seconds making as much useful >> read/write data on array, how? good read/write algorithms for raid. >> (for each device type, ssd, hd) but... like stefan, disks are your >> bottleneck > > No, they are not. Run some benchmarks yourself if you don't believe > me. Lol - I wouldn't have answered in the first place if I didn't have any expertise. So suit yourself - as you don't bring up any real numbers (remember: you've got the weird setup, you asked, you don't have enough money for the enterprise solution - so ...) nobody who worked with 3ware controllers will believe you. > > Even a single disk drive is performing better than the hw RAID under > this workload. Well - that is the problem - simulate YOUR workload. Actually I fear at least one of your disks has a grown defect, which slows down / blocks i/o. Haven't seen any 9650SE RAID being slower than the same config in a software raid. > > Best regards, > > Wolfgang Denk > -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
