From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CC69E8.FBE0B96A" Subject: Re: Bad performance when reads and writes on same LUN Date: Fri, 2 Sep 2011 20:24:26 -0700 Message-ID: <116197A0179A3D4A95B135E5F0341FC11041B4DA@SACMVEXC2-PRD.hq.netapp.com> From: "Neto, Antonio Jose Rodrigues" To: axboe@kernel.dk Cc: zhu.yanhai@gmail.com, "Rettl, Matthias" , fio@vger.kernel.org List-ID: This is a multi-part message in MIME format. ------_=_NextPart_001_01CC69E8.FBE0B96A Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 VGhhbmtzIEplbnMsIGJ1dCB3aHkgd2hlbiB3ZSBydW4gUkVBRFMgb25seSAobm90IG1peGVkKSB3 ZSBkb24ndCBoYXZlIHBlcmZvcm1hbmNlIGlzc3Vlcz8gKFdlIHJ1biB3aXRoIGRpcmVjdD0wKT8N Cg0KLS0tLS0gT3JpZ2luYWwgTWVzc2FnZSAtLS0tLQ0KRnJvbTogSmVucyBBeGJvZSA8YXhib2VA a2VybmVsLmRrPg0KVG86IE5ldG8sIEFudG9uaW8gSm9zZSBSb2RyaWd1ZXMNCkNjOiB6aHUueWFu aGFpQGdtYWlsLmNvbSA8emh1LnlhbmhhaUBnbWFpbC5jb20+OyBSZXR0bCwgTWF0dGhpYXM7IGZp b0B2Z2VyLmtlcm5lbC5vcmcgPGZpb0B2Z2VyLmtlcm5lbC5vcmc+DQpTZW50OiBGcmkgU2VwIDAy IDIwOjA5OjI2IDIwMTENClN1YmplY3Q6IFJlOiBCYWQgcGVyZm9ybWFuY2Ugd2hlbiByZWFkcyBh bmQgd3JpdGVzIG9uIHNhbWUgTFVODQoNCk9uIDIwMTEtMDktMDIgMjE6MDYsIE5ldG8sIEFudG9u aW8gSm9zZSBSb2RyaWd1ZXMgd3JvdGU6DQo+IFRoZSBxdWVzdGlvbiB0aGF0IEkgaGF2ZSBpczoN Cj4gDQo+ICJCdWZmZXJlZCBhaW8gd2lsbCBmYWxsIGJhY2sgdG8gc3luYyBpbywgYW5kIGl0J3Mg a25vd24gdGhhdCBtaXhpbmciDQo+IA0KPiBXaHkgZGlkIGJ1ZmZlcmVkIGFpbyB3aWxsIGZhbGwg YmFjayB0byBzeW5jIGlvPw0KDQpQbGVhc2UgZG9uJ3QgdG9wIHBvc3QsIHJlcGx5IGJlbmVhdCB0 aGUgb3JpZ2luYWwgdGV4dC4NCg0KQnVmZmVyZWQgYWlvIHdpbGwgZGVnZW5lcmF0ZSB0byBub3Jt YWwgc3luYyBJTywgYmVjYXVzZSB0aGUga2VybmVsIGRvZXMNCm5vdCBzdXBwb3J0IGFzeW5jIGJ1 ZmZlcmVkIGlvLg0KDQotLSANCkplbnMgQXhib2UNCg0K ------_=_NextPart_001_01CC69E8.FBE0B96A Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: base64 PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDMuMi8vRU4iPg0KPEhUTUw+ DQo8SEVBRD4NCjxNRVRBIEhUVFAtRVFVSVY9IkNvbnRlbnQtVHlwZSIgQ09OVEVOVD0idGV4dC9o dG1sOyBjaGFyc2V0PXV0Zi04Ij4NCjxNRVRBIE5BTUU9IkdlbmVyYXRvciIgQ09OVEVOVD0iTVMg RXhjaGFuZ2UgU2VydmVyIHZlcnNpb24gNi41Ljc2NTYuMCI+DQo8VElUTEU+UmU6IEJhZCBwZXJm b3JtYW5jZSB3aGVuIHJlYWRzIGFuZCB3cml0ZXMgb24gc2FtZSBMVU48L1RJVExFPg0KPC9IRUFE Pg0KPEJPRFk+DQo8IS0tIENvbnZlcnRlZCBmcm9tIHRleHQvcGxhaW4gZm9ybWF0IC0tPg0KDQo8 UD48Rk9OVCBTSVpFPTI+VGhhbmtzIEplbnMsIGJ1dCB3aHkgd2hlbiB3ZSBydW4gUkVBRFMgb25s eSAobm90IG1peGVkKSB3ZSBkb24ndCBoYXZlIHBlcmZvcm1hbmNlIGlzc3Vlcz8gKFdlIHJ1biB3 aXRoIGRpcmVjdD0wKT88QlI+DQo8QlI+DQotLS0tLSBPcmlnaW5hbCBNZXNzYWdlIC0tLS0tPEJS Pg0KRnJvbTogSmVucyBBeGJvZSAmbHQ7YXhib2VAa2VybmVsLmRrJmd0OzxCUj4NClRvOiBOZXRv LCBBbnRvbmlvIEpvc2UgUm9kcmlndWVzPEJSPg0KQ2M6IHpodS55YW5oYWlAZ21haWwuY29tICZs dDt6aHUueWFuaGFpQGdtYWlsLmNvbSZndDs7IFJldHRsLCBNYXR0aGlhczsgZmlvQHZnZXIua2Vy bmVsLm9yZyAmbHQ7ZmlvQHZnZXIua2VybmVsLm9yZyZndDs8QlI+DQpTZW50OiBGcmkgU2VwIDAy IDIwOjA5OjI2IDIwMTE8QlI+DQpTdWJqZWN0OiBSZTogQmFkIHBlcmZvcm1hbmNlIHdoZW4gcmVh ZHMgYW5kIHdyaXRlcyBvbiBzYW1lIExVTjxCUj4NCjxCUj4NCk9uIDIwMTEtMDktMDIgMjE6MDYs IE5ldG8sIEFudG9uaW8gSm9zZSBSb2RyaWd1ZXMgd3JvdGU6PEJSPg0KJmd0OyBUaGUgcXVlc3Rp b24gdGhhdCBJIGhhdmUgaXM6PEJSPg0KJmd0OzxCUj4NCiZndDsgJnF1b3Q7QnVmZmVyZWQgYWlv IHdpbGwgZmFsbCBiYWNrIHRvIHN5bmMgaW8sIGFuZCBpdCdzIGtub3duIHRoYXQgbWl4aW5nJnF1 b3Q7PEJSPg0KJmd0OzxCUj4NCiZndDsgV2h5IGRpZCBidWZmZXJlZCBhaW8gd2lsbCBmYWxsIGJh Y2sgdG8gc3luYyBpbz88QlI+DQo8QlI+DQpQbGVhc2UgZG9uJ3QgdG9wIHBvc3QsIHJlcGx5IGJl bmVhdCB0aGUgb3JpZ2luYWwgdGV4dC48QlI+DQo8QlI+DQpCdWZmZXJlZCBhaW8gd2lsbCBkZWdl bmVyYXRlIHRvIG5vcm1hbCBzeW5jIElPLCBiZWNhdXNlIHRoZSBrZXJuZWwgZG9lczxCUj4NCm5v dCBzdXBwb3J0IGFzeW5jIGJ1ZmZlcmVkIGlvLjxCUj4NCjxCUj4NCi0tPEJSPg0KSmVucyBBeGJv ZTxCUj4NCjxCUj4NCjwvRk9OVD4NCjwvUD4NCg0KPC9CT0RZPg0KPC9IVE1MPg== ------_=_NextPart_001_01CC69E8.FBE0B96A--