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High availability within a hardware unit with redundant disks (mostly"},{"line_number":49,"context_line":"   organized into different RAID configurations), redundant control components,"}],"source_content_type":"text/x-rst","patch_set":2,"id":"1f1a1f67_ef81effc","line":46,"range":{"start_line":46,"start_character":66,"end_line":46,"end_character":72},"in_reply_to":"1f1a1f67_bbcd7d67","updated":"2017-07-17 14:14:00.000000000","message":"Done","commit_id":"b9dd7c66aaad566ca74c53ca7093a46f4feba767"},{"author":{"_account_id":2394,"name":"Adam Spiers","email":"aspiers@suse.com","username":"adam.spiers"},"change_message_id":"f0474e655052e90d187a3b9bee56a56d001ca56c","unresolved":false,"context_lines":[{"line_number":8,"context_line":""},{"line_number":9,"context_line":"Hardware"},{"line_number":10,"context_line":"~~~~~~~~"},{"line_number":11,"context_line":"Using different technologies to enable high availability on the hardware"},{"line_number":12,"context_line":"level provides a good basis to build a high available system. The next chapters"},{"line_number":13,"context_line":"discuss the most common technologies used in this field."},{"line_number":14,"context_line":""}],"source_content_type":"text/x-rst","patch_set":3,"id":"1f1a1f67_a749d6b7","line":11,"updated":"2017-07-17 19:29:40.000000000","message":"If there is a good reason to remove the information about provider / self-service networks, please can you justify it in the commit message? Currently the commit message only mentions what is added, not what is removed. Thanks!","commit_id":"f2b684104e446ea8a2891923fc56bf4d1de19b68"},{"author":{"_account_id":21723,"name":"Gergely Csatari","email":"gergely.csatari@nokia.com","username":"csatari"},"change_message_id":"8e4e21911874933f19a4e25cd76a2cca15caec83","unresolved":false,"context_lines":[{"line_number":8,"context_line":""},{"line_number":9,"context_line":"Hardware"},{"line_number":10,"context_line":"~~~~~~~~"},{"line_number":11,"context_line":"Using different technologies to enable high availability on the hardware"},{"line_number":12,"context_line":"level provides a good basis to build a high available system. The next chapters"},{"line_number":13,"context_line":"discuss the most common technologies used in this field."},{"line_number":14,"context_line":""}],"source_content_type":"text/x-rst","patch_set":3,"id":"1f1a1f67_62295ae4","line":11,"in_reply_to":"1f1a1f67_a749d6b7","updated":"2017-07-18 08:58:03.000000000","message":"I think the networking options are not related to hardware HA. I will explain this in the commit message.","commit_id":"f2b684104e446ea8a2891923fc56bf4d1de19b68"},{"author":{"_account_id":2394,"name":"Adam Spiers","email":"aspiers@suse.com","username":"adam.spiers"},"change_message_id":"f0474e655052e90d187a3b9bee56a56d001ca56c","unresolved":false,"context_lines":[{"line_number":25,"context_line":"   redundant switch either in active/active or active/passive way."},{"line_number":26,"context_line":""},{"line_number":27,"context_line":"#. The network topology should be designed in a way the the network router can"},{"line_number":28,"context_line":"   use at least two path in every critical direction."},{"line_number":29,"context_line":""},{"line_number":30,"context_line":"Bonded interfaces"},{"line_number":31,"context_line":"-----------------"}],"source_content_type":"text/x-rst","patch_set":3,"id":"1f1a1f67_47320260","line":28,"range":{"start_line":28,"start_character":20,"end_line":28,"end_character":24},"updated":"2017-07-17 19:29:40.000000000","message":"\"paths\"","commit_id":"f2b684104e446ea8a2891923fc56bf4d1de19b68"},{"author":{"_account_id":21723,"name":"Gergely Csatari","email":"gergely.csatari@nokia.com","username":"csatari"},"change_message_id":"8e4e21911874933f19a4e25cd76a2cca15caec83","unresolved":false,"context_lines":[{"line_number":25,"context_line":"   redundant switch either in active/active or active/passive way."},{"line_number":26,"context_line":""},{"line_number":27,"context_line":"#. The network topology should be designed in a way the the network router can"},{"line_number":28,"context_line":"   use at least two path in every critical direction."},{"line_number":29,"context_line":""},{"line_number":30,"context_line":"Bonded interfaces"},{"line_number":31,"context_line":"-----------------"}],"source_content_type":"text/x-rst","patch_set":3,"id":"1f1a1f67_c2682e1e","line":28,"range":{"start_line":28,"start_character":20,"end_line":28,"end_character":24},"in_reply_to":"1f1a1f67_47320260","updated":"2017-07-18 08:58:03.000000000","message":"Done","commit_id":"f2b684104e446ea8a2891923fc56bf4d1de19b68"},{"author":{"_account_id":2394,"name":"Adam Spiers","email":"aspiers@suse.com","username":"adam.spiers"},"change_message_id":"f0474e655052e90d187a3b9bee56a56d001ca56c","unresolved":false,"context_lines":[{"line_number":30,"context_line":"Bonded interfaces"},{"line_number":31,"context_line":"-----------------"},{"line_number":32,"context_line":"Bonded interfaces are two independent physical network interfaces handled as"},{"line_number":33,"context_line":"one interface in active/passive mode. In case of an error in the active network"},{"line_number":34,"context_line":"interface or in the remote end of the interface the interfaces are"},{"line_number":35,"context_line":"switched over."},{"line_number":36,"context_line":""}],"source_content_type":"text/x-rst","patch_set":3,"id":"1f1a1f67_c773b215","line":33,"range":{"start_line":33,"start_character":14,"end_line":33,"end_character":36},"updated":"2017-07-17 19:29:40.000000000","message":"This is not entirely accurate - whilst bonding can be configured in active/passive mode, Linux also supports 6 different active/active bonding modes:\n\nhttps://www.kernel.org/doc/Documentation/networking/bonding.txt","commit_id":"f2b684104e446ea8a2891923fc56bf4d1de19b68"},{"author":{"_account_id":21723,"name":"Gergely Csatari","email":"gergely.csatari@nokia.com","username":"csatari"},"change_message_id":"8e4e21911874933f19a4e25cd76a2cca15caec83","unresolved":false,"context_lines":[{"line_number":30,"context_line":"Bonded interfaces"},{"line_number":31,"context_line":"-----------------"},{"line_number":32,"context_line":"Bonded interfaces are two independent physical network interfaces handled as"},{"line_number":33,"context_line":"one interface in active/passive mode. In case of an error in the active network"},{"line_number":34,"context_line":"interface or in the remote end of the interface the interfaces are"},{"line_number":35,"context_line":"switched over."},{"line_number":36,"context_line":""}],"source_content_type":"text/x-rst","patch_set":3,"id":"1f1a1f67_62615a05","line":33,"range":{"start_line":33,"start_character":14,"end_line":33,"end_character":36},"in_reply_to":"1f1a1f67_c773b215","updated":"2017-07-18 08:58:03.000000000","message":"Done","commit_id":"f2b684104e446ea8a2891923fc56bf4d1de19b68"},{"author":{"_account_id":22406,"name":"Kien Nguyen","email":"kiennt2609@gmail.com","username":"kiennt"},"change_message_id":"177ae9260e934d411f4d40dd4c117c0125cf2839","unresolved":false,"context_lines":[{"line_number":14,"context_line":""},{"line_number":15,"context_line":"Redundant switches"},{"line_number":16,"context_line":"------------------"},{"line_number":17,"context_line":"Network switches are easily become single point of failures as networking is"},{"line_number":18,"context_line":"critical to operate all other basic domains, like compute and storage, of the"},{"line_number":19,"context_line":"infrastructure. Network switches need to be able forward the network traffic"},{"line_number":20,"context_line":"and be able to forward the traffic to a working next hop."}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_0d8f7775","line":17,"range":{"start_line":17,"start_character":17,"end_line":17,"end_character":34},"updated":"2017-07-18 09:06:01.000000000","message":"s/are easily become/easily become/g","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":2394,"name":"Adam Spiers","email":"aspiers@suse.com","username":"adam.spiers"},"change_message_id":"395dfcffbba816a2ba9929b348f55b7c20fe5f06","unresolved":false,"context_lines":[{"line_number":14,"context_line":""},{"line_number":15,"context_line":"Redundant switches"},{"line_number":16,"context_line":"------------------"},{"line_number":17,"context_line":"Network switches are easily become single point of failures as networking is"},{"line_number":18,"context_line":"critical to operate all other basic domains, like compute and storage, of the"},{"line_number":19,"context_line":"infrastructure. Network switches need to be able forward the network traffic"},{"line_number":20,"context_line":"and be able to forward the traffic to a working next hop."}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_42141944","line":17,"range":{"start_line":17,"start_character":17,"end_line":17,"end_character":34},"in_reply_to":"1f1a1f67_0d8f7775","updated":"2017-07-18 11:05:36.000000000","message":"Personally I would drop \"become\" altogether, since generally network switches are either SPoF at the time they are installed, or never SPoF. I suspect it\u0027s rare that they would start off by not being SPoF at installation time, and then \"become\" SPoF later. (Note that a device does not become a SPoF at the time of the first failure; by definition it is a SPoF if its own failure can cause everything else to fail, even if that failure never happens.)","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":21723,"name":"Gergely Csatari","email":"gergely.csatari@nokia.com","username":"csatari"},"change_message_id":"545db50cd46a83d0452f9fa4a47e54ab0da99ec1","unresolved":false,"context_lines":[{"line_number":14,"context_line":""},{"line_number":15,"context_line":"Redundant switches"},{"line_number":16,"context_line":"------------------"},{"line_number":17,"context_line":"Network switches are easily become single point of failures as networking is"},{"line_number":18,"context_line":"critical to operate all other basic domains, like compute and storage, of the"},{"line_number":19,"context_line":"infrastructure. Network switches need to be able forward the network traffic"},{"line_number":20,"context_line":"and be able to forward the traffic to a working next hop."}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_ae4f2669","line":17,"range":{"start_line":17,"start_character":17,"end_line":17,"end_character":34},"in_reply_to":"1f1a1f67_42141944","updated":"2017-07-19 14:12:44.000000000","message":"Done","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":2394,"name":"Adam Spiers","email":"aspiers@suse.com","username":"adam.spiers"},"change_message_id":"395dfcffbba816a2ba9929b348f55b7c20fe5f06","unresolved":false,"context_lines":[{"line_number":15,"context_line":"Redundant switches"},{"line_number":16,"context_line":"------------------"},{"line_number":17,"context_line":"Network switches are easily become single point of failures as networking is"},{"line_number":18,"context_line":"critical to operate all other basic domains, like compute and storage, of the"},{"line_number":19,"context_line":"infrastructure. Network switches need to be able forward the network traffic"},{"line_number":20,"context_line":"and be able to forward the traffic to a working next hop."},{"line_number":21,"context_line":"For these reasons consider the following two factors when making a network"}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_62595533","line":18,"range":{"start_line":18,"start_character":45,"end_line":18,"end_character":69},"updated":"2017-07-18 11:05:36.000000000","message":"IMHO this clause disrupts the flow of this sentence.  I think it reads better if you put it at the end:\n\nNetwork switches can easily be single point of failures since networking is critical for correct operation of all other basic domains of the infrastructure, such as compute and storage.","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":21723,"name":"Gergely Csatari","email":"gergely.csatari@nokia.com","username":"csatari"},"change_message_id":"545db50cd46a83d0452f9fa4a47e54ab0da99ec1","unresolved":false,"context_lines":[{"line_number":15,"context_line":"Redundant switches"},{"line_number":16,"context_line":"------------------"},{"line_number":17,"context_line":"Network switches are easily become single point of failures as networking is"},{"line_number":18,"context_line":"critical to operate all other basic domains, like compute and storage, of the"},{"line_number":19,"context_line":"infrastructure. Network switches need to be able forward the network traffic"},{"line_number":20,"context_line":"and be able to forward the traffic to a working next hop."},{"line_number":21,"context_line":"For these reasons consider the following two factors when making a network"}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_ce43823e","line":18,"range":{"start_line":18,"start_character":45,"end_line":18,"end_character":69},"in_reply_to":"1f1a1f67_62595533","updated":"2017-07-19 14:12:44.000000000","message":"Done","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":22406,"name":"Kien Nguyen","email":"kiennt2609@gmail.com","username":"kiennt"},"change_message_id":"177ae9260e934d411f4d40dd4c117c0125cf2839","unresolved":false,"context_lines":[{"line_number":16,"context_line":"------------------"},{"line_number":17,"context_line":"Network switches are easily become single point of failures as networking is"},{"line_number":18,"context_line":"critical to operate all other basic domains, like compute and storage, of the"},{"line_number":19,"context_line":"infrastructure. Network switches need to be able forward the network traffic"},{"line_number":20,"context_line":"and be able to forward the traffic to a working next hop."},{"line_number":21,"context_line":"For these reasons consider the following two factors when making a network"},{"line_number":22,"context_line":"switch redundant:"}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_2ddb537c","line":19,"range":{"start_line":19,"start_character":44,"end_line":19,"end_character":48},"updated":"2017-07-18 09:06:01.000000000","message":"s/able/able to/g","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":21723,"name":"Gergely Csatari","email":"gergely.csatari@nokia.com","username":"csatari"},"change_message_id":"545db50cd46a83d0452f9fa4a47e54ab0da99ec1","unresolved":false,"context_lines":[{"line_number":16,"context_line":"------------------"},{"line_number":17,"context_line":"Network switches are easily become single point of failures as networking is"},{"line_number":18,"context_line":"critical to operate all other basic domains, like compute and storage, of the"},{"line_number":19,"context_line":"infrastructure. Network switches need to be able forward the network traffic"},{"line_number":20,"context_line":"and be able to forward the traffic to a working next hop."},{"line_number":21,"context_line":"For these reasons consider the following two factors when making a network"},{"line_number":22,"context_line":"switch redundant:"}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_ae78468f","line":19,"range":{"start_line":19,"start_character":44,"end_line":19,"end_character":48},"in_reply_to":"1f1a1f67_2ddb537c","updated":"2017-07-19 14:12:44.000000000","message":"Done","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":22406,"name":"Kien Nguyen","email":"kiennt2609@gmail.com","username":"kiennt"},"change_message_id":"177ae9260e934d411f4d40dd4c117c0125cf2839","unresolved":false,"context_lines":[{"line_number":24,"context_line":"#. The network switch itself should synchronize its internal state to a"},{"line_number":25,"context_line":"   redundant switch either in active/active or active/passive way."},{"line_number":26,"context_line":""},{"line_number":27,"context_line":"#. The network topology should be designed in a way the the network router can"},{"line_number":28,"context_line":"   use at least two paths in every critical direction."},{"line_number":29,"context_line":""},{"line_number":30,"context_line":"Bonded interfaces"}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_0de4173b","line":27,"range":{"start_line":27,"start_character":52,"end_line":27,"end_character":59},"updated":"2017-07-18 09:06:01.000000000","message":"duplicate","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":21723,"name":"Gergely Csatari","email":"gergely.csatari@nokia.com","username":"csatari"},"change_message_id":"545db50cd46a83d0452f9fa4a47e54ab0da99ec1","unresolved":false,"context_lines":[{"line_number":24,"context_line":"#. The network switch itself should synchronize its internal state to a"},{"line_number":25,"context_line":"   redundant switch either in active/active or active/passive way."},{"line_number":26,"context_line":""},{"line_number":27,"context_line":"#. The network topology should be designed in a way the the network router can"},{"line_number":28,"context_line":"   use at least two paths in every critical direction."},{"line_number":29,"context_line":""},{"line_number":30,"context_line":"Bonded interfaces"}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_ce5ca21a","line":27,"range":{"start_line":27,"start_character":52,"end_line":27,"end_character":59},"in_reply_to":"1f1a1f67_0de4173b","updated":"2017-07-19 14:12:44.000000000","message":"Done","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":2394,"name":"Adam Spiers","email":"aspiers@suse.com","username":"adam.spiers"},"change_message_id":"395dfcffbba816a2ba9929b348f55b7c20fe5f06","unresolved":false,"context_lines":[{"line_number":31,"context_line":"-----------------"},{"line_number":32,"context_line":"Bonded interfaces are two independent physical network interfaces handled as"},{"line_number":33,"context_line":"one interface in active/passive or in active/active redundancy mode. In"},{"line_number":34,"context_line":"active/passive mode if an error happens in the active network interface or in"},{"line_number":35,"context_line":"the remote end of the interface the interfaces are switched over. In"},{"line_number":36,"context_line":"active/active mode when an error happens in an interface or in the remote end"},{"line_number":37,"context_line":"of an interface the the interface is considered as passive."}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_a27c0d83","line":34,"range":{"start_line":34,"start_character":15,"end_line":34,"end_character":22},"updated":"2017-07-18 11:05:36.000000000","message":"\"... mode, if ...\"","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":21723,"name":"Gergely Csatari","email":"gergely.csatari@nokia.com","username":"csatari"},"change_message_id":"545db50cd46a83d0452f9fa4a47e54ab0da99ec1","unresolved":false,"context_lines":[{"line_number":31,"context_line":"-----------------"},{"line_number":32,"context_line":"Bonded interfaces are two independent physical network interfaces handled as"},{"line_number":33,"context_line":"one interface in active/passive or in active/active redundancy mode. 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In"},{"line_number":36,"context_line":"active/active mode when an error happens in an interface or in the remote end"},{"line_number":37,"context_line":"of an interface the the interface is considered as passive."},{"line_number":38,"context_line":""}],"source_content_type":"text/x-rst","patch_set":4,"id":"1f1a1f67_2268fdb6","line":35,"range":{"start_line":35,"start_character":18,"end_line":35,"end_character":46},"updated":"2017-07-18 11:05:36.000000000","message":"\"the interface, the interfaces\"","commit_id":"95f0f648b452161d583d71d4b2598b66d1bf2003"},{"author":{"_account_id":21723,"name":"Gergely Csatari","email":"gergely.csatari@nokia.com","username":"csatari"},"change_message_id":"545db50cd46a83d0452f9fa4a47e54ab0da99ec1","unresolved":false,"context_lines":[{"line_number":32,"context_line":"Bonded interfaces are two independent physical network interfaces handled as"},{"line_number":33,"context_line":"one interface in active/passive or in active/active redundancy mode. 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