From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Kierski Subject: RE: best base / worst case RAID 5,6 write speeds Date: Tue, 22 Dec 2015 14:34:27 +0000 Message-ID: References: <22128.11867.847781.946791@quad.stoffel.home> <22128.35881.182823.556362@quad.stoffel.home> <5672BB7A.4050808@turmel.org> <567339F0.9000209@turmel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: Content-Language: en-US Sender: linux-raid-owner@vger.kernel.org To: "doug@easyco.com" Cc: Linux-RAID List-Id: linux-raid.ids SGV5IERvdWcsDQoNCkkgd291bGQgYmUgaW50ZXJlc3RlZCBpbiBzZWVpbmcgdGhlIHBhdGNoIHlv dSdyZSB0YWxraW5nIGFib3V0LiAgSSB3b25kZXIgaWYgdGhhdCBjb2RlIGNvdWxkbid0IGJlIHR1 cm5lZCBvbi9vZmYgd2l0aCBhIHR1bmluZyBwYXJhbWV0ZXIgb3IgbW9kdWxlIHBhcmFtLg0KDQpC b2IgS2llcnNraQ0KU2VuaW9yIFN0b3JhZ2UgUGVyZm9ybWFuY2UgRW5naW5lZXINCkNyYXkgSW5j Lg0KMzgwIEphY2tzb24gU3RyZWV0DQpTdWl0ZSAyMTANClN0LiBQYXVsLCBNTiA1NTEwMQ0KVGVs ZTogNjUxLTk2Ny05NTkwDQpGYXg6ICA2NTEtNjA1LTkwMDENCkNlbGw6IDY1MS04OTAtNzQ2MQ0K DQoNCi0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQpGcm9tOiBsaW51eC1yYWlkLW93bmVyQHZn ZXIua2VybmVsLm9yZyBbbWFpbHRvOmxpbnV4LXJhaWQtb3duZXJAdmdlci5rZXJuZWwub3JnXSBP biBCZWhhbGYgT2YgRG91ZyBEdW1pdHJ1DQpTZW50OiBUdWVzZGF5LCBEZWNlbWJlciAyMiwgMjAx NSAxMjoxNiBBTQ0KQ2M6IExpbnV4LVJBSUQNClN1YmplY3Q6IFJlOiBiZXN0IGJhc2UgLyB3b3Jz dCBjYXNlIFJBSUQgNSw2IHdyaXRlIHNwZWVkcw0KDQpNeSBhcG9sb2dpZXMgZm9yIGRpdmluZyBp biBzbyBsYXRlLg0KDQpJIHJvdXRpbmVseSBydW4gMjQgZHJpdmUgcmFpZC01IHNldHMgd2l0aCBT U0RzLiAgQ2h1bmsgaXMgc2V0IGF0IDMySyBhbmQgdGhlIGFwcGxpY2F0aW9ucyBvbmx5IHdyaXRl cyAicGVyZmVjdCIgNzM2SyAic3RyaXBlcyIuICBUaGUgU1NEcyBhcmUgU2Ftc3VuZyA4NTAgcHJv cyBvbiBkZWRpY2F0ZWQgTFNJIDMwMDggU0FTIHBvcnRzIGFuZCBhcmUgYXQgIm5ldyINCnByZWNv bmRpdGlvbmluZyAoaWUsIHRoZXkgYXJlIGF0IGZ1bGwgc3BlZWQpIG9yIGp1c3Qgb3ZlciA1MDAg TUIvc2VjLg0KQ1BVIGlzIGEgc2luZ2xlIEU1LTE2NTAgdjMuDQoNCldpdGggc3RvY2sgUkFJRC01 IGNvZGUsIEkgZ2V0IGFib3V0IDEuOCBHQi9zZWMsIHE9NC4NCg0KTm93IHRoaXMgYXBwbGljYXRp b24gaXMgd3JpdGluZyBmcm9tIGtlcm5lbCBzcGFjZSAoZ2VuZXJpY19tYWtlX3JlcXVlc3Qgdy8g cSB3YWl0aW5nIGZvciBjb21wbGV0aW9uIGNhbGxiYWNrKS4gIFRoZXJlIGFyZSBhIGxvdCBvZiBS TVcgb3BlcmF0aW9ucyBoYXBwZW5pbmcgaGVyZS4gIEkgdGhpbmsgdGhlIHJhaWQtNSBiYWNrZ3Jv dW5kIHRocmVhZCBpcyB3YWtpbmcgdXAgYXN5bmNocm9ub3VzbHkgd2hlbiBvbmx5IGEgcGFydCBv ZiB0aGUgd3JpdGUgaGFzIGJlZW4gYnVmZmVyZWQgaW50byBzdHJpcGUgY2FjaGUgcGFnZXMuICBU aGUgYmlvIGdvaW5nIGludG8gdGhlIHJhaWQgbGF5ZXIgaXMgYSBzaW5nbGUgYmlvLCBzbyBub3Ro aW5nIGlzIGJlaW5nIGNhcnZlZCB1cCBvbiB0aGUgcmVxdWVzdCBlbmQuICBUaGUgcmFpZC01IGhl bHBlciB0aHJlYWQgYWxzbyBzYXR1cmF0ZXMgYSBjcHUgY29yZSAod2hpY2ggaXMgYWJvdXQgYXMg ZmFzdCBhcyB5b3UgY2FuIGdldCB3aXRoIGFuIEU1LTE2NTApLg0KDQpJZiBJIHBhdGNoIHJhaWQ1 LmtvIHdpdGggc3BlY2lhbCBjYXNlIGNvZGUgdG8gYXZvaWQgdGhlIHN0cmlwZSBjYWNoZSBhbmQg anVzdCBjb21wdXRlIHBhcml0eSBhbmQgZ28sIHRoZSB3cml0ZSB0aHJvdWdocHV0IGdvZXMgdXAg YWJvdmUgMTFHQi9zZWMuDQoNClRoaXMgaXMgb2J2aW91c2x5IGFuIGltcG9zc2libGUgSU8gcGF0 dGVybiBmb3IgbW9zdCBhcHBsaWNhdGlvbnMsIGJ1dCBkb2VzIGNvbmZpcm0gdGhhdCB0aGUgdXBw ZXIgbGltaXQgb2YgKG4tMSkqYncgaXMgInBvc3NpYmxlIiwgYnV0IG5vdCB3aXRoIHRoZSBjdXJy ZW50IHN0cmlwZSBjYWNoZSBsb2dpYyBpbiB0aGUgcmFpZCBsYXllci4NCg0KRG91ZyBEdW1pdHJ1 DQpXaWxkRmlyZSBTdG9yYWdlDQotLQ0KVG8gdW5zdWJzY3JpYmUgZnJvbSB0aGlzIGxpc3Q6IHNl bmQgdGhlIGxpbmUgInVuc3Vic2NyaWJlIGxpbnV4LXJhaWQiIGluIHRoZSBib2R5IG9mIGEgbWVz c2FnZSB0byBtYWpvcmRvbW9Admdlci5rZXJuZWwub3JnIE1vcmUgbWFqb3Jkb21vIGluZm8gYXQg IGh0dHA6Ly92Z2VyLmtlcm5lbC5vcmcvbWFqb3Jkb21vLWluZm8uaHRtbA0K