I think the concept of a warm start is a carryover from early SeaQuest days. A warm start was proposed to maintain some monitor and TM states, but it never was fully implemented.
Regards, Sean *From:* Liu, Ming (Ming) [mailto:[email protected]] *Sent:* Tuesday, March 15, 2016 10:03 AM *To:* [email protected] *Subject:* 答复: 答复: Anyway to start Trafodion without sqstart The purpose I guess is to bypass time-consuming database recovery if it is a warm start. Say, if you have a clean shutdown of Trafodion, you can warm restart it. If one use ‘ckillall’, or simply loss power, one needs a cold start. But I think this is just the concept. May not support yet? We studied the two gomon scripts, seems identical except some minor difference. And Narendra is correct, I misunderstand the startup code. It is possible. Thanks, Ming *发件人**:* Gunnar Tapper [mailto:[email protected] <[email protected]>] *发送时间:* 2016年3月16日 0:36 *收件人:* [email protected] *主题:* Re: 答复: Anyway to start Trafodion without sqstart BTW, in what cases should gomon.warm or the sqstart warm argument be used? Thanks, Gunnar On Tue, Mar 15, 2016 at 10:30 AM, Narendra Goyal <[email protected]> wrote: Yes, one can follow the commands in ‘gomon.cold’ (that sqstart uses (what Selva mentioned)) to startup without sqstart. As such, before ‘sqstart’ executes the commands in ‘gomon.cold’, it does some other checks (like checks for orphan processes), and cleans up IPC constructs (semaphores, queues, shared memory) via sqipcrm. Thanks, -Narendra *From:* Gunnar Tapper [mailto:[email protected]] *Sent:* Tuesday, March 15, 2016 8:10 AM *To:* [email protected] *Subject:* Re: 答复: Anyway to start Trafodion without sqstart The use case is how Apache Ambari works: it assume node-by-node management of services. This is how you achieve rolling upgrades, stopping all services on a node, etc. I wonder if it's possible to first start the monitor (using the startup command) and then start/stop other components per node. Kind of a hybrid model. DCS/REST should already support this use case since it's based on the HBase model where the scripts start daemons on each configured node. Gunnar On Tue, Mar 15, 2016 at 8:57 AM, Liu, Ming (Ming) <[email protected]> wrote: >From my understanding, it is invalid to start trafodion on node by node mode. Monitor simulate a single image of operating system from a bunch of nodes. One process can be configured to be a pair: active and standby. So when start a trafodion process, it will start two processes on two nodes. It is hard to start a single node. Is there any use case to do so? Thanks, Ming *发件人**:* Selva Govindarajan [mailto:[email protected]] *发送时间**:* 2016年3月15日 22:27 *收件人**:* [email protected] *主**题**:* RE: Anyway to start Trafodion without sqstart Yes. The sqgen command takes in the configuration file for the trafodion cluster and generates gomon.cold, gomon.warm and other relevant scripts. These generated scripts are copied to all nodes in the cluster. These scripts are nothing but the commands to sqshell. sqstart uses either gomon.cold or gomon.warm to start the Trafodion instance. Selva *From:* Gunnar Tapper [mailto:[email protected]] *Sent:* Monday, March 14, 2016 10:03 PM *To:* [email protected] *Subject:* Re: Anyway to start Trafodion without sqstart DCS and REST follow the HBase model so that should be a simple matter of invoking the *-daemon.sh scripts. I think the rest is a matter of using sqshell: [centos@trafodion incubator-trafodion]$ sqshell Processing cluster.conf on local host trafodion.novalocal [SHELL] Shell/shell Version 1.0.1 Apache_Trafodion Release 2.0.0 (Build debug [centos], date 11Mar16) [SHELL] %help [SHELL] usage: shell {[-a|-i] [<scriptfile>]} | {-c <command>} [SHELL] - commands: [SHELL] -- Command line environment variable replacement: ${<var_name>} [SHELL] -- ! comment statement [SHELL] -- cd <path> [SHELL] -- delay <seconds> [SHELL] -- down <nid> [, <reason-string>] [SHELL] -- dump [{path <pathname>}] <process name> | <nid,pid> [SHELL] -- echo [<string>] [SHELL] -- event [{ASE|TSE|DTM|AMP|BO|VR|CS}] <event_id> [<nid,pid> [ event-data] ] [SHELL] -- exec [{[debug][nowait][pri <value>][name <process name>] [SHELL] [nid <zone or node number>][type {AMP|ASE|BO|CS|DTM|PSD|SMS|SPX|SSMP|TSE|VR}] [SHELL] -- [in <file>|#default][out <file>|#default]}] path [[<args>]...] [SHELL] -- exit [!] [SHELL] -- help [SHELL] -- kill [{abort}] <process name> | <nid,pid> [SHELL] -- ldpath [<directory>[,<directory>]...] [SHELL] -- ls [{[detail]}] [<path>] [SHELL] -- measure | measure_cpu [SHELL] -- monstats [SHELL] -- node [info [<nid>]] [SHELL] -- path [<directory>[,<directory>]...] [SHELL] -- ps [{ASE|TSE|DTM|AMP|BO|VR|CS}] [<process_name>|<nid,pid>] [SHELL] -- pwd [SHELL] -- quit [SHELL] -- scanbufs [SHELL] -- set [{[nid <number>]|[process <name>]}] key=<value string> [SHELL] -- show [{[nid <number>]|[process <name>]}] [key] [SHELL] -- shutdown [[immediate]|[abrupt]|[!]] [SHELL] -- startup [trace] [<trace level>] [SHELL] -- suspend [<event_id>] [SHELL] -- time <shell command> [SHELL] -- trace <number> [SHELL] -- up <name> [SHELL] -- wait [<process name> | <nid,pid>] [SHELL] -- warmstart [trace] [<trace level>] [SHELL] -- zone [nid <nid>|zid <zid>] [ Obviously, you can up/down nodes but I don't know how that works in relationship to the startup command. On Mon, Mar 14, 2016 at 11:52 AM, Amanda Moran <[email protected]> wrote: Hi there- Is there a way to start up Trafodion not by using sqstart...? I would like to be able to start up/stop each node individually. Thanks! -- Thanks, Amanda Moran -- Thanks, Gunnar *If you think you can you can, if you think you can't you're right.* -- Thanks, Gunnar *If you think you can you can, if you think you can't you're right.* -- Thanks, Gunnar *If you think you can you can, if you think you can't you're right.*
