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[89.65.189.48]) by mx.google.com with ESMTPSA id o4sm12825343eef.20.2014.03.21.10.09.04 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 21 Mar 2014 10:09:05 -0700 (PDT) From: Arkadiusz =?utf-8?q?Mi=C5=9Bkiewicz?= Subject: Re: [FAQ] XFS speculative preallocation Date: Fri, 21 Mar 2014 18:09:03 +0100 References: <20140321162920.GA3087@laptop.bfoster> In-Reply-To: <20140321162920.GA3087@laptop.bfoster> MIME-Version: 1.0 Message-Id: <201403211809.03683.arekm@maven.pl> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com T24gRnJpZGF5IDIxIG9mIE1hcmNoIDIwMTQsIEJyaWFuIEZvc3RlciB3cm90ZToKPiBIaSBhbGws Cj4gCj4gRXJpYyBoYWQgc3VnZ2VzdGVkIHdlIGFkZCBhbiBGQVEgZW50cnkgZm9yIHNwZWN1bGF0 aXZlIHByZWFsbG9jYXRpb24KPiBzaW5jZSBpdCBzZWVtcyB0byBiZSBhIGNvbW1vbiBxdWVzdGlv biwgc28gSSBvZmZlcmVkIHRvIHdyaXRlIHNvbWV0aGluZwo+IHVwLiBJIHN0YXJ0ZWQgd2l0aCBh IHNpbmdsZSBlbnRyeSBidXQgc3BsaXQgaXQgaW50byBhIGNvdXBsZSBRJ3Mgd2hlbiBpdAo+IHR1 cm5lZCBpbnRvIFRMO0RSIGZvZGRlci4gOykKPiAKPiBUaGUgdGV4dCBpcyBlbWJlZGRlZCBiZWxv dyBmb3IgcmV2aWV3LiBUaG91Z2h0cyBvbiB0aGUgcXVlc3Rpb25zIG9yCj4gY29udGVudCBpcyBh cHByZWNpYXRlZC4gQWxzbywgb25jZSBmb2xrcyBhcmUgT2sgd2l0aCB0aGlzLi4uIGhvdyBkb2Vz Cj4gb25lIGdhaW4gZWRpdCBhY2Nlc3MgdG8gdGhlIHdpa2k/CgpNb3JlIHF1ZXN0aW9ucyBvciB0 b3BpY3MgdGhhdCBjYW4gYmUgY29udmVydGVkIHRvIHF1ZXN0aW9ucyBmcm9tIG1lOgoKMSkgQmVm b3JlIHByZWFsbG9jYXRpb24ga2VybmVsIGRpZCB0aGluZ3MgZGlmZmVyZW50bHkuIEFGQUlLIGl0 IHdhc24ndCB0aGUgCnNhbWUgYXMgYWxsb2NzaXplPTY0aywgd2FzIGl0PyBJcyB0aGVyZSBhIHdh eSB0byBnZXQgb2xkIGJlaGF2aW91ciBvciAKc29tZXRoaW5nIHNpbWlsYXIgdG8gb2xkIGJlaGF2 aW91cj8KCjIpIElzIHRoZXJlIGEgd2F5IHRvIHNlZSB3aGljaCBmaWxlIGdvdCBzb21lIHByZWFs bG9jYXRpb24gYW5kIGhvdyBiaWcgdGhhdCAKcHJlYWxsb2NhdGlvbiBpcz8gU2NlbmFyaW8gLSBz b21ldGhpbmcgYXRlIGZyZWUgc3BhY2UgZHVlIHRvIHByZWFsbG9jYXRpb24gYW5kIApmcm9tIGFk bWluIHBvaW50IG9mIHZpZXcgaXQgd291bGQgYmUgdXNlZnVsbCB0byBrbm93IHdoaWNoIGFwcCBk aWQgdGhhdCBhbmQgCmhvdyBtYW55IE1CIHdhcyBkdWUgdG8gcHJlYWxsb2NhdGlvbiAodnMgcmVh bCwgd3JpdHRlbiBkYXRhKS4KCj4gTGludXggMy44IChhbmQgbGF0ZXIpIGluY2x1ZGVzIGEgc2Nh bm5lciB0byBwZXJmb3JtIGJhY2tncm91bmQgdHJpbW1pbmcKPiBvZiBmaWxlcyB3aXRoIGxpbmdl cmluZyBwb3N0LUVPRiBwcmVhbGxvY2F0aW9ucy4gVGhlIHNjYW5uZXIgYnlwYXNzZXMKPiBmaWxl cyB0aGF0IGhhdmUgYmVlbiByZWNlbnRseSAKCldoYXQgdGltZSBpcyAicmVjZW50bHkiID8gSXMg Im1vZGlmaWVkIiBlcXVhbCB0byAiZmlsZSBkYXRhIG1vZGlmaWVkIiBvciAiZmlsZSAKZGF0YSBv ciBtZXRhZGF0YSBtb2RpZmllZCIgPwoKPiBtb2RpZmllZCB0byBub3QgaW50ZXJmZXJlIHdpdGgg b25nb2luZwo+IHdyaXRlcy4KCkluIGNhc2Ugb2Ygc29tZSBhcHAgdGhhdCBjb25zdGFudGx5IHdy aXRlcyB0byBmaWxlcyAoYXBhY2hlIHdlYiBzZXJ2ZXIgCndyaXR0aW5nIHRvIGl0cyBsb2dzIGZv ciBleGFtcGxlKSB0aGF0IGJhY2tncm91bmQgdHJpbW1pbmcgd2lsbCBuZXZlciBkbyAKYW55dGhp bmcgZm9yIHRoZXNlIGZpbGVzLCByaWdodD8KCj4gQSA1IG1pbnV0ZSBzY2FuIGludGVydmFsIGlz IHVzZWQgYnkgZGVmYXVsdCBhbmQgY2FuIGJlIGFkanVzdGVkCj4gdmlhIHRoZSBmb2xsb3dpbmcg ZmlsZSAodmFsdWUgaW4gc2Vjb25kcyk6Cj4gCj4gCS9wcm9jL3N5cy9mcy94ZnMvc3BlY3VsYXRp dmVfcHJlYWxsb2NfbGlmZXRpbWUKPiAKPiBBbHRob3VnaCBzcGVjdWxhdGl2ZSBwcmVhbGxvY2F0 aW9uIGNhbiBsZWFkIHRvIHJlcG9ydHMgb2YgZXhjZXNzIHNwYWNlCj4gdXNhZ2UsIHRoZSBwcmVh bGxvY2F0ZWQgc3BhY2UgaXMgbm90IHBlcm1hbmVudCB1bmxlc3MgZXhwbGljaXRseSBtYWRlIHNv Cj4gdmlhIGZhbGxvY2F0ZSBvciBhIHNpbWlsYXIgaW50ZXJmYWNlLiBQcmVhbGxvY2F0ZWQgc3Bh Y2UgY2FuIGFsc28gYmUKPiBlbmNvZGVkIHBlcm1hbmVudGx5IGluIHNpdHVhdGlvbnMgd2hlcmUg ZmlsZSBzaXplIGlzIGV4dGVuZGVkIGJleW9uZCBhCj4gcmFuZ2Ugb2YgcG9zdC1FT0YgYmxvY2tz IChpLmUuLCB2aWEgdHJ1bmNhdGUpLiBPdGhlcndpc2UsIHByZWFsbG9jYXRlZAo+IGJsb2NrcyBh cmUgcmVjbGFpbWVkIG9uIGZpbGUgY2xvc2UsIGlub2RlIHJlY2xhaW0sIHVubW91bnQgb3IgaW4g dGhlCj4gYmFja2dyb3VuZCBvbmNlIGZpbGUgd3JpdGUgYWN0aXZpdHkgc3Vic2lkZXMuCgpTbyB0 aGVyZSBpcyBubyBtZWNoYW5pc20gdGhhdCB3b3VsZCBzaGlybmsgcHJlYWxsb2NhdGlvbnMgaW4g Y2FzZSB3aGVuIGZyZWUgCnNwYWNlIGlzIChhbG1vc3Qgb3IpIGdvbmUgb24gYSBmcz8gQ2FzZTog YXBhY2hlIGNhdXNlcyB4ZnMgdG8gcHJlYWxsb2NhdGUgCnNldmVyYWwgR0IgZm9yIGl0cyAvdmFy Ly4uLi4ve2FjY2VzcyxlcnJvcn1fbG9nIChjb21tb24gcHJvYmxlbSBoZXJlKSBhbmQgdGhlbiAK ZnJlZSBzcGFjZSBlbmRzIG9uIHRoYXQgZnMgY2F1c2luZyBwcm9ibGVtcyBmb3IgZXZlcnkgYXBw IHRoYXQgd3JpdGVzIHRvIC92YXIuCgpUaGFua3MhCgotLSAKQXJrYWRpdXN6IE1pxZtraWV3aWN6 LCBhcmVrbSAvIG1hdmVuLnBsCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fXwp4ZnMgbWFpbGluZyBsaXN0Cnhmc0Bvc3Muc2dpLmNvbQpodHRwOi8vb3NzLnNn aS5jb20vbWFpbG1hbi9saXN0aW5mby94ZnMK