From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Wilck Subject: Re: Questions around multipath failover and no_path_retry Date: Mon, 19 Mar 2018 23:48:43 +0100 Message-ID: <1521499723.3798.153.camel@suse.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: 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: Karan Vohra , "dm-devel@redhat.com" List-Id: dm-devel.ids T24gU3VuLCAyMDE4LTAzLTExIGF0IDE2OjQ3ICswMDAwLCBLYXJhbiBWb2hyYSB3cm90ZToKPiBI aSBGb2xrcywKPiAKPiBMZXQgdXMgYXNzdW1lLCB0aGVyZSBhcmUgMiBwYXRocyB3aXRoaW4gdGhl IHBhdGggZ3JvdXAgd2hpY2ggZG0tCj4gbXVsdGlwYXRoIGlzIHNlbmRpbmcgdGhlIEkvT3MgaW4g cm91bmQtcm9iaW4gZmFzaGlvbi4gRWFjaCBvZiB0aGVzZQo+IHBhdGhzIGFyZSBpZGVudGlmaWVk IGFzIHVuaXF1ZSBibG9jayBkZXZpY2Uocykgc3VjaCBhcyAvZGV2L3NkYiBhbmQKPiAvZGV2L3Nk Yy4gCj4gCj4gTGV0IHVzIHNheSBzb21lIEkvT3MgYXJlIHNlbnQgb3ZlciB0byB0aGUgcGF0aCAv ZGV2L3NkYiBhbmQgZWl0aGVyCj4gdGhlIHJlcXVlc3RzIHRpbWUgb3V0IG9yIHRoZXJlIGlzIGEg ZmFpbHVyZSBvbiB0aGF0IHBhdGgsIHdoYXQKPiBoYXBwZW5zIHRvIHRob3NlIEkvT3M/IEFyZSB0 aGV5IHNlbnQgb3ZlciB0byB0aGUgb3RoZXIgcGF0aCAtCj4gL2Rldi9zZGMgb3IgZG9lcyBkbS1t dWx0aXBhdGggd2FpdHMgZm9yIC9kZXYvc2RiIHRvIGNvbWUgYmFjayBvbmxpbmUKPiBhbmQgb25s eSBzZW5kcyBJL08gdG8gL2Rldi9zZGI/CgpUaGUgSS9PIGlzIHNlbnQgdG8gb3RoZXJyIHBhdGhz IChzZGMgaW4geW91ciBleGFtcGxlKSB3aGVuIHRoZSBsb3dlcgpsYXllciAoZS5nLiBTQ1NJKSBp bmRpY2F0ZXMgcGF0aCBmYWlsdXJlIGZvciBzZGIuIFRoYXQncyB0aGUgdmVyeSBwb2ludApvZiBt dWx0aXBhdGhpbmcuCgo+ICBPbmUgb2YgdGhlIHJlYXNvbnMgd2UgYXJlIGNvbmNlcm5lZCBhYm91 dCB0aGUgYWJvdmUgc2NlbmFyaW8gaXMtIGxldAo+IHVzIHNheSB0aGVyZSBpcyBhIHdyaXRlIEkv TyBXMSB3aGljaCBpcyByb3V0ZWQgdG8gL2Rldi9zZGIgYW5kIHRoZW4KPiB0aGVyZSBpcyBhIGZh aWx1cmUuIFRoZXJlIHdhcyBhIHdyaXRlIEkvTyBXMiB3aGljaCB3cm90ZSBhdCB0aGUgc2FtZQo+ IGJsb2NrIHZpYSAvZGV2L3NkYy4gTm93IGlmIG11bHRpcGF0aCBzZW5kcyBXMSB0aHJvdWdoIC9k ZXYvc2RjLCBXMgo+IGdldHMgb3ZlcndyaXR0ZW4gYnkgVzEuIFRoZSBleHBlY3RhdGlvbiB3YXMg dGhhdCBXMiBoYXBwZW5zIGFmdGVyIFcxCj4gYW5kIHNob3VsZCBvdmVyd3JpdGUgVzEgYnV0IHRo ZSByZXN1bHQgaXMgb3Bwb3NpdGUuIAoKSWYgeW91IHNlbmQgdHdvIHdyaXRlIElPcyB0byB0aGUg c2FtZSBzZWN0b3IgYXQgdGhlIHNhbWUgdGltZSwgeW91CmNhbid0IGJlIHN1cmUgd2hpY2ggb25l IGFycml2ZXMgZmlyc3QuIFRoYXQncyBub3Qgc3BlY2lmaWMgdG8KbXVsdGlwYXRoLiBJZiB5b3Ug d2FudCB0byBndWFyYW50ZWUgb3JkZXJpbmcsIHlvdSBoYXZlIHRvIGZsdXNoIFcxIAp1c2luZyBl LmcuIGZkYXRhc3luYygpIGJlZm9yZSBzZW5kaW5nIFcyLiBUaGUgZmx1c2ggY29tbWFuZCB3b24n dApyZXR1cm4gYmVmb3JlIFcxIGlzIHdyaXR0ZW4gdG8gZGlzay4KCj4gU2l0dWF0aW9ucyBsaWtl IHRoZXNlIGNhbiBjYXVzZSBkYXRhIGluY29uc2lzdGVuY3kgYW5kIGNvcnJ1cHRpb24uV2UKPiB3 ZXJlIHRoaW5raW5nIG9mIHVzaW5nIG5vX3BhdGhfcmV0cnkgY29uZmlndXJhdGlvbiB0byBiZSBz ZXQgdG8gcXVldWUKPiB0byBtYWtlIHN1cmUgdGhhdCB0aGUgSS9PcyBzdXBwb3NlZCB0byBiZSBn b2luZyB0byBwYXRoMSBuZXZlciBtYWtlCj4gaXQgdG8gcGF0aDIuCgpUaGF0IHdvbid0IHdvcmsu IEFzIHRoZSBuYW1lIG9mIHRoZSBvcHRpb24gc3VnZ2Vlc3RzLCAibm9fcGF0aF9yZXRyeSIKb25s eSBhZmZlY3RzIHRoZSBiZWhhdmlvciBpZiB0aGVyZSdzIF9ub18gaGVhbHRoeSBwYXRoIGxlZnQu Cgo+ICBCdXQgdGhlIHF1ZXN0aW9uIGlzIHRoYXQgd291bGQgbm90IHRoYXQgY2F1c2UgdW5leHBl Y3RlZCBiZWhhdmlvciBpbgo+IGFwcGxpY2F0aW9uIGxheWVyPyBMZXQgdXMgc2F5IHRoZXJlIGFy ZSBJL08gUmVxdWVzdHMgUjEsIFIyLCBSMyBhbmQKPiBzbyBvbi4uIFIxIGlzIGdvaW5nIHRvIFBh dGgxLCBSMiBpcyBnb2luZyB0byBQYXRoMiBhbmQgc28gb24uIElmCj4gUGF0aDEgZGllcyBmb3Ig c29tZSByZWFzb24sIHdpdGggdGhlIHNldHRpbmcgb2Ygbm9fcGF0aF9yZXRyeSB0bwo+IHF1ZXVl LCBxdWV1ZWluZyB3aWxsIG5vdCBzdG9wIHVudGlsIHRoZSBwYXRoIGlzIGZpeGVkIHNvIGRvZXMg bm90Cj4gdGhhdCBtZWFuIHRoYXQgUjEsIFIzLFI1IC4uLiB3aWxsIG5vdCBtYWtlIGl0IHRvIGJs b2NrIGRldmljZSB1bnRpbAo+IHRoZSBwYXRoIGlzIGZpeGVkPyBXb3VsZCBpdCBub3QgY2F1c2Ug ZmFpbHVyZXMgaWYgdGhlIGlzc3VlIHBlcnNpc3RzCj4gZm9yIHNlY29uZHM/IAoKQXMgSSBzYWlk LCB0aGF0J3Mgbm90IGhvdyBpdCB3b3Jrcy4gUjEtPlAxLCBSMi0+UDIsIC4uLiBvbmx5IGhvbGRz IGFzCmxvbmcgYXMgYWxsIHBhdGhzIGFyZSB1cCAoYW5kIG5vIElPIHNjaGVkdWxlciBpcyBhY3Rp dmUgd2hpY2ggbWlnaHQgcmUtCm9yZGVyIHlvdXIgSS9PIHJlcXVlc3RzKS4KCj4gV2hhdCBhYm91 dCB0aGUgc2l6ZSBvZiBxdWV1ZT8gSXMgdGhlcmUgYW55IGRhbmdlciBvZiBxdWV1ZSBnZXR0aW5n Cj4gb3ZlcmxvYWRlZD9BbnkgcG9pbnRlcnMgb3IgcmVmZXJlbmNlcyB3b3VsZCBiZSBvZiBncmVh dCBoZWxwLgoKVGhlb3JldGljYWxseSwgdGhlIHF1ZXVlIGlzIG9ubHkgbGltaXRlZCBieSBtZW1v cnkgc2l6ZS4KCk1hcnRpbgoKPiAKPiBUaGFua3MhCj4gS2FyYW4KPiAKPiAKPiBHZXQgT3V0bG9v ayBmb3IgQW5kcm9pZAo+IAo+IC0tCj4gZG0tZGV2ZWwgbWFpbGluZyBsaXN0Cj4gZG0tZGV2ZWxA cmVkaGF0LmNvbQo+IGh0dHBzOi8vd3d3LnJlZGhhdC5jb20vbWFpbG1hbi9saXN0aW5mby9kbS1k ZXZlbAoKLS0gCkRyLiBNYXJ0aW4gV2lsY2sgPG13aWxja0BzdXNlLmNvbT4sIFRlbC4gKzQ5ICgw KTkxMSA3NDA1MyAyMTA3ClNVU0UgTGludXggR21iSCwgR0Y6IEZlbGl4IEltZW5kw7ZyZmZlciwg SmFuZSBTbWl0aGFyZCwgR3JhaGFtIE5vcnRvbgpIUkIgMjEyODQgKEFHIE7DvHJuYmVyZykKCi0t CmRtLWRldmVsIG1haWxpbmcgbGlzdApkbS1kZXZlbEByZWRoYXQuY29tCmh0dHBzOi8vd3d3LnJl ZGhhdC5jb20vbWFpbG1hbi9saXN0aW5mby9kbS1kZXZlbA==