Hi Amir, Thanks for the explanation. I noticed an address I didn't expect in a peer list, and so was trying to understand how it got there. This helps.
It's no problem for me that peer blocks are persistent. I saw that I can remove one for the case of those created by erroneous configurations, etc. -Olaf ________________________________________ From: Amir Shehata <[email protected]> Sent: Thursday, August 27, 2020 9:12 AM To: Faaland, Olaf P. Cc: [email protected] Subject: Re: [lustre-discuss] definition of a peer Hi Olaf, A peer block on a local node is always created whenever you either try to communicate with it or it tries to communicate with you. So let's look at the active/passive cases Active case 1. You try to send a message to <peer1-ip>@<net> 2. Lnet creates a peer block to identify that peer 3. OPTION 1: The message succeeds and you receive a response. Peer block remains. 4. OPTION 2: The message fails. Although you have not received a response that peer block remains Passive case 1. You receive a message from <peer1-ip>@<net> 2. Lnet creates a peer block to identify that peer 3. OPTION 1: Response succeeds. peer block remains 4. OPTION 2: Response fails. In both 3&4 the peer block remains. When you do a "lnetctl peer show" on the local net, what you're seeing is the set of peers since the startup of LNet which you either tried to communicate with or they tried to communicate with you, irregardless of success. Question: Are you having problems with the fact that peers remain even after the physical node has gone away (or potentially peer blocks which have been created due to erroneous operations - bad config, etc)? thanks amir On Wed, 26 Aug 2020 at 16:00, Faaland, Olaf P. <[email protected]<mailto:[email protected]>> wrote: FWIW, I now think an lnet peer is just "a node I've communicated with at some time". -Olaf ________________________________________ From: lustre-discuss <[email protected]> on behalf of Faaland, Olaf P. <[email protected]> Sent: Wednesday, August 26, 2020 11:53 AM To: [email protected] Subject: [lustre-discuss] definition of a peer Hi All, What is the definition of an lnet peer (in Lustre 2.12 and in master, if the definition has changed over time)? I had believed it was a node that could be communicated with directly from LNet's perspective, e.g. without requiring transit through a lustre router. But that seems not to be true on a node I'm looking at. thanks, -Olaf _______________________________________________ lustre-discuss mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org _______________________________________________ lustre-discuss mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org _______________________________________________ lustre-discuss mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
