Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 57265 invoked from network); 10 Aug 2010 07:29:03 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 10 Aug 2010 07:29:03 -0000 Received: (qmail 10641 invoked by uid 500); 10 Aug 2010 07:29:02 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 10442 invoked by uid 500); 10 Aug 2010 07:28:57 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 10434 invoked by uid 99); 10 Aug 2010 07:28:56 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 10 Aug 2010 07:28:56 +0000 X-ASF-Spam-Status: No, hits=0.7 required=10.0 tests=RCVD_IN_DNSWL_NONE,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (athena.apache.org: local policy) Received: from [209.85.212.44] (HELO mail-vw0-f44.google.com) (209.85.212.44) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 10 Aug 2010 07:28:46 +0000 Received: by vws10 with SMTP id 10so7974163vws.31 for ; Tue, 10 Aug 2010 00:28:24 -0700 (PDT) MIME-Version: 1.0 Received: by 10.220.98.193 with SMTP id r1mr10203001vcn.229.1281425303709; Tue, 10 Aug 2010 00:28:23 -0700 (PDT) Sender: scode@scode.org Received: by 10.220.189.74 with HTTP; Tue, 10 Aug 2010 00:28:23 -0700 (PDT) X-Originating-IP: [90.232.141.187] In-Reply-To: References: Date: Tue, 10 Aug 2010 09:28:23 +0200 X-Google-Sender-Auth: JiLXsO9qZC5ZrQYi_cH9OP9VC8k Message-ID: Subject: Re: Using a separate commit log drive was 4x slower From: Peter Schuller To: user@cassandra.apache.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 SSBoYXZlIG5vIGV4cGxhbmF0aW9uIGZvciB0aGUgc2xvd2VyIHJlYWRzLCBidXQgSSBoYXZlIGFu IGh5cG90aGVzaXMKb24gdGhlIHdyaXRlcy4KCllvdXIgaW9zdGF0IHNob3dzOgoKPiBEZXZpY2U6 wqDCoMKgwqDCoMKgwqDCoCBycnFtL3PCoMKgIHdycW0vc8KgwqDCoMKgIHIvc8KgwqDCoMKgIHcv c8KgwqAgcnNlYy9zwqDCoCB3c2VjL3MgYXZncnEtc3ogYXZncXUtc3rCoMKgIGF3YWl0wqAgc3Zj dG3CoCAldXRpbAo+IGNjaXNzL2MwZDDCoMKgwqDCoMKgwqDCoCAwLjAwwqDCoCA5MDguNTDCoMKg wqAgMC4wMMKgIDExMC41MMKgwqDCoMKgIDAuMDDCoCA4MTUyLjAwwqDCoMKgIDczLjc3wqDCoMKg wqAgMC41N8KgwqDCoCA1LjIwwqDCoCA0LjkzwqAgNTQuNTAKPiBjY2lzcy9jMGQxwqDCoMKgwqDC oMKgwqAgMC4wMMKgwqDCoMKgIDAuMDDCoMKgIDE2LjUwwqDCoMKgIDAuMDDCoCAxNDI0LjAwwqDC oMKgwqAgMC4wMMKgwqDCoCA4Ni4zMMKgwqDCoMKgIDAuMTDCoMKgwqAgNi4wNsKgwqAgMi43M8Kg wqAgNC41MAo+IGRtLTDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCAwLjAwwqDCoMKgwqAgMC4w MMKgwqDCoCAwLjAwIDEwMTkuMDDCoMKgwqDCoCAwLjAwwqAgODE1Mi4wMMKgwqDCoMKgIDguMDDC oMKgwqDCoCA2LjI1wqDCoMKgIDYuMTPCoMKgIDAuNTPCoCA1NC41MAo+IGRtLTHCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoCAwLjAwwqDCoMKgwqAgMC4wMMKgwqDCoCAwLjAwwqDCoMKgIDAuMDDC oMKgwqDCoCAwLjAwwqDCoMKgwqAgMC4wMMKgwqDCoMKgIDAuMDDCoMKgwqDCoCAwLjAwwqDCoMKg IDAuMDDCoMKgIDAuMDDCoMKgIDAuMDAKClNvIHRoYXQncyBrZWVwaW5nIHRoZSBkaXNrIGJ1c3kg YXJvdW5kIDUwLTYwJSBvZiB0aGUgdGltZS4gVGhpcyBzZWVtcwpyb3VnaGx5IGNvbnNpc3RlbnQg d2l0aCB5b3VyIGNvbW1pdCBiYXRjaCB3aW5kb3cgYmVpbmcgc2V0IHRvIDUgbXMgYW5kCnRoZSBz eXN0ZW0gZHJpdmUgTk9UIGJlaW5nIHN1cHBvcnRlZCBieSBhIGJhdHRlcnktYmFja2VkIGNhY2hl IChzdWNoCnRoYXQgYW4gZnN5bmMoKSBhY3R1YWxseSBkb2VzIGhhdmUgdG8gd2FpdCBmb3IgdGhl IGRhdGEgdG8gYmUgb24gdGhlCnBsYXR0ZXIpLgoKSXMgeW91ciBub24tc3lzdGVtIGRyaXZlIGJh Y2tlZCBieSB0aGUgQkJVPyAoSSdtIG5vdCBzdXJlIGlmIHRoZQpjb250cm9sbGVycyB3b3VsZCBz dXBwb3J0IGhhdmluZyBzb21lIHZvbHVtZXMgYmFja2VkIGJ5IEJCVSBwcm90ZWN0ZWQKY2FjaGUg YW5kIG5vdCBvdGhlcnMuKQoKSWYgaXQgaXMgdGhlIGNhc2UgdGhhdCB0aGUgb3RoZXIgdm9sdW1l IGlzIEJCVSBiYWNrZWQsIHRoZW4gbWF5YmUgdGhlCnNsb3dkb3duIG9uIHdyaXRlcyBpcyBkdWUg dG8gdGhpcy4gSW4gYW55IGNhc2UsIHdoYXRldmVyIHRoZSBzaXR1YXRpb24Kd2FzIGJlZm9yZSwg dGhlIGFib3ZlIHN0YXRzIGRvIHNlZW0gcm91Z2hseSBjb25zaXN0ZW50IHdpdGgKd3JpdGUtdGhy b3VnaCBmc3luYygpIGFuZCBiYXRjaCB3aW5kb3cgb2YgNW1zLCBnaXZlbiBzdWZmaWNpZW50CmNv bmN1cnJlbmN5IHRvIGFjaGlldmUgdGhlIHRocm91Z2hwdXQgeW91J3JlIHNlZWluZy4gT24gdGhl IG90aGVyCmhhbmQsICJyb3VnaGx5IGNvbnNpc3RlbnQiIGlzIG5vdCB2ZXJ5IHByZWNpc2UsIGFu ZCB0aGUgb3JpZ2luYWwKcGVyZm9ybWFuY2Ugb24gdGhlIFJBSUQ6ZWQgZGV2aWNlIGlzIHByb2Jh Ymx5IGFsc28gcm91Z2hseSBjb25zaXN0ZW50CndpdGggdGhpcyA7KQoKLS0KLyBQZXRlciBTY2h1 bGxlcgo=