From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Bryn M. Reeves" Subject: Re: Powerpath vs dm-multipath - two points of FUD? Date: Wed, 10 Sep 2014 11:04:19 +0100 Message-ID: <20140910100419.GB17924@localhost.localdomain> References: Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: device-mapper development List-Id: dm-devel.ids T24gVHVlLCBTZXAgMDksIDIwMTQgYXQgMDU6NTA6NDlQTSArMDEwMCwgUm9iIHdyb3RlOgo+IEZp cnN0bHksIGFwb2xvZ2llcyBpZiB0aGlzIGlzIGEgY29tbW9uIHRvcGljIGFuZCBteSBpbnRlbnRp b25zIGFyZSBub3QgdG8KPiBzdGFydCBhIGZsYW1lIHdhci4gSSd2ZSBnb29nbGVkIGV4dGVuc2l2 ZWx5IGJ1dCBoYXZlbid0IGZvdW5kIHNwZWNpZmljCj4gaW5mb3JtYXRpb24gdG8gYWRkcmVzcyBt eSBxdWVyaWVzLCBzbyBJIHRob3VnaHQgSSB3b3VsZCB0dXJuIGhlcmUuCgpEci4gRnJlZW1hbiwg SSBwcmVzdW1lPyA7KQogCj4gKkhlcmXigJlzIGEgY291cGxlIG9mIHJlYXNvbnMgdG8gc3RpY2sg d2l0aCBwb3dlcnBhdGg6KiBMb2FkCj4gQmFsYW5jaW5nOiBXaGlsc3QgZG0tbXVsdGlwYXRoIGNh biBtYWtlIHVzZSBvZiBtb3JlIHRoYW4gb25lIG9mIHRoZSBwYXRocwo+IHRvIGFuIGFycmF5LCAu aS5lIHdpdGggcm91bmQtcm9iaW4sIHRoaXMgaXNu4oCZdCB0cnVlIGxvYWQtYmFsYW5jaW5nLgoK SGFzbid0IGJlZW4gdHJ1ZSBzaW5jZSBSSEVMNS4gUkhFTDYncyBrZXJuZWwgaGFzIHJlcXVlc3Qt YmFzZWQKZGV2aWNlLW1hcHBlciBhbmQgdGhlIFNDU0kgZGV2aWNlX2hhbmRsZXIgaW5mcmFzdHJ1 Y3R1cmUgd2hpY2ggYWxsb3dzCnRoZSBkbS1tdWx0aXBhdGggdGFyZ2V0IHRvIG1ha2UgYmV0dGVy IGRlY2lzaW9ucyBpbiByZXNwb25zZSB0byBkZXZpY2UKdXRpbGlzYXRpb24gYW5kIGVycm9yIGNv bmRpdGlvbnMuIEluIGFkZGl0aW9uIHRvIHRoZSBzaW1wbGUgcm91bmQtcm9iaW4KcGF0aCBzZWxl Y3RvciBSSEVMNiAoYW5kIGxhdGVyKSBkZXZpY2UtbWFwcGVyLW11bHRpcGF0aCBzdXBwb3J0cyB0 aGUKcXVldWUtbGVuZ3RoIGFuZCBzZXJ2aWNlLXRpbWUgcGF0aCBzZWxlY3RvcnMuIFRoZXNlIHJv dXRlIElPIHRvIHRoZQpkZXZpY2Ugd2l0aCB0aGUgc2hvcnRlc3QgcXVldWUgb3IgYmVzdCBzZXJ2 aWNlIHRpbWUgKHNob3J0ZXN0IHF1ZXVlCnJlbGF0aXZlIHRvIHRoZSBkZXZpY2UncyB0aHJvdWdo cHV0KS4gSXQncyByZWxhdGl2ZWx5IGVhc3kgdG8gYWRkIGEgbmV3CnBhdGggc2VsZWN0b3IgLSB0 aGUgZGlmZmljdWx0IHBhcnQgaXMgdG8gZGVmaW5lIGdlbmVyYWxseSB1c2VmdWwKc2VsZWN0aW9u IGFsZ29yaXRobXMuCgpPbmUgdGhpbmcgdG8gYmVhciBpbiBtaW5kIGlzIHRoYXQgYWxsIG9mIHRo ZSBMaW51eCBtdWx0aXBhdGggc29sdXRpb25zCnNpdCBvbiB0b3Agb2YgdGhlIHNhbWUgU0NTSSBp bmZyYXN0cnVjdHVyZTsgSSd2ZSBzZWVuIHNpdHVhdGlvbnMgd2hlcmUKaG9zdHMgdXNpbmcgbXVs dGlwYXRoLXRvb2xzLCBQb3dlclBhdGggYW5kIFZlcml0YXMgVnhETVAgYWxsIHN1ZmZlcmVkCmEg c2ltaWxhciBmYWlsdXJlIGR1ZSB0byBhIGhhcmR3YXJlIGZ1YWx0IGNvbmRpdGlvbiB0aGF0IHdh cyBub3QgaGFuZGxlZAp3ZWxsIGJ5IHRoZSBMaW51eCBtaWRsYXllciBhdCB0aGUgdGltZS4KCj4g IFBvd2VycGF0aCBpcyBhYmxlIHRvIGV4YW1pbmUgdGhlIHBhdGhzIGRvd24gdG8gdGhlIGFycmF5 IGFuZCBiYWxhbmNlCj4gd29ya2xvYWQgYmFzZWQgb24gaG93IGJ1c3kgdGhlIHN0b3JhZ2UgY29u dHJvbGxlciAvIHBvcnRzIGFyZS4gIEFGQUlLIFJoZWw2Cj4gaGFzIGFkZGVkIGZ1bmN0aW9uYWxp dHkgdG8gbWFrZSBwYXRoIGNob2ljZXMgYmFzZWQgb24gcXVldWUgZGVwdGggYW5kCj4gc2Vydmlj ZSB0aW1lLCB3aGljaCBkb2VzIGFkZCBzb21lIGltcHJvdmVtZW50IG92ZXIgdmFuaWxsYSByb3Vu ZC1yb2Jpbi4gRm9yCj4gVk1BWCBhbmQgQ1gvVk5YLCBwb3dlcnBhdGggdXNlcyB0aGUgZm9sbG93 aW5nIHBhcmFtZXRlcnMgdG8gYmFsYW5jZSB0aGUKPiBwYXRocyBvdXQ6IFBlbmRpbmcgSS9PcyBv biB0aGUgcGF0aCwgU2l6ZSBvZiBJL09zLCBUeXBlcyBvZiBJL09zLCBhbmQgUGF0aHMKClBvd2Vy UGF0aCBkb2VzIHN1cHBvcnQgdmFyaW91cyBtb2RlcyBvZiBvcHRpbWlzYXRpb24gdGhhdCBhcmUg c3BlY2lmaWMKdG8gRU1DIGFycmF5cyAoaWlyYyBzZXBhcmF0ZSBwb2xpY2llcyBleGlzdCBmb3Ig U3ltbWV0cml4IGFuZCBvdGhlcgpwcm9kdWN0IGxpbmVzKS4gVGhlc2UgYXJlIGJhc2VkIG9uIGFu IHVuZGVyc3RhbmRpbmcgb2YgdGhlIGRldmljZQppbnRlcm5hbHMgYW5kIHJlbHkgb24gaW5mb3Jt YXRpb24gdGhhdCBpcyBub3QgcHVibGljbHkgYXZhaWxhYmxlIC0gZS5nLgpJJ3ZlIHNlZW4gY2Fz ZXMgd2hlcmUgUG93ZXJQYXRoIGRlY2lkZXMgdG8gcm91dGUgYWxsIElPIHRvIGEgc2luZ2xlIHBv cnQKb2YgYSBTeW1tZXRyaXggcHJlc3VtYWJseSBiZWNhdXNlIHRoaXMgZ2l2ZXMgaW1wcm92ZWQg Y2FjaGUgYmVoYXZpb3VyLgoKPiBtb3N0IHJlY2VudGx5IHVzZWQuICogRmxha2V5IFBhdGggRGV0 ZWN0aW9uOiBUaGUgbGF0ZXN0IHZlcnNpb25zIG9mCj4gcG93ZXJwYXRoIGNhbiBwcm9hY3RpdmVs eSB0YWtlIHBhdGhzIG91dCBvZiBzZXJ2aWNlIHNob3VsZCBpdCBvYnNlcnZlCj4gaW50ZXJtaXR0 ZW50IElPIGZhaWx1cmVzIChyZW1lbWJlciBhbnkgSU8gZmFpbHVyZSBjYW4gaG9sZCBhIHRocmVh ZCBmb3IKPiAzMC02MCBzZWNvbmRzIHdoaWxzdCB0aGUgU0NTSSBjb21tYW5kIGZ1cnRoZXIgdXAg dGhlIHN0YWNrIHRpbWVzIG91dCwgYW5kIGEKPiByZXRyeSBpcyBzZW50KS4gIGRtLW11bHRpcGF0 aCBkb2VzbuKAmXQgaGF2ZSBmdW5jdGlvbmFsaXR5IHRvIHJlbW92ZSBhIGZsYWtleQo+IHBhdGgs IHBhdGhzIGNhbiBvbmx5IGJlIG1hcmtlZCBvdXQgb2Ygc2VydmljZSBvbiBoYXJkIGZhaWx1cmUu KgoKVGhpcyBpcyBzb21ldGhpbmcgSSd2ZSBkaXNjdXNzZWQgYSBmZXcgdGltZXMuIEl0J3MgYSB1 c2VmdWwgZmVhdHVyZSBidXQKb25lIHRoYXQgbWFpbmx5IGNvbWVzIGludG8gcGxheSB3aGVuIGRl YWxpbmcgd2l0aCBmYWlsaW5nIG9yIG1hcmdpbmFsCmhhcmR3YXJlLgoKUmVnYXJkcywKQnJ5bi4K Ci0tCmRtLWRldmVsIG1haWxpbmcgbGlzdApkbS1kZXZlbEByZWRoYXQuY29tCmh0dHBzOi8vd3d3 LnJlZGhhdC5jb20vbWFpbG1hbi9saXN0aW5mby9kbS1kZXZlbA==