Re: UML sequence diagrams on Wiki for explaining read/write path
Great stuff! You wrote "When the replica node comes back online the coordinator node will send the data to the replica node", which is partially true - if the replica comes back online within the timeout window of three hours. So, you probably want to say something like: "If the replica node comes back online within the hinted handoff window the coordinator node will send the data to the replica node, otherwise the replica node will need to be repaired." And maybe mention the configuration of the window. Change "The data is stored for a default period of 3 hours" to "The data is stored for a default period of 3 hours, configurable using the max_hint_window_in_ms property in cassandra.yaml." -- Jack Krupansky On Mon, Nov 30, 2015 at 2:24 AM, Michael Edge wrote: > Write path docs updated on Wiki - please review diagram/text and let me > have your comments (or update text in place). > > https://wiki.apache.org/cassandra/WritePathForUsers > > Cheers, > > Michael > > On 26 November 2015 at 11:25, Michael Shuler > wrote: > > > On 11/25/2015 07:36 PM, Michael Edge wrote: > > > I'd like to update the read/write path description on the wiki (see > link > > > below) by adding a couple of UML sequence diagrams I drew a while ago. > I > > > think they are much better than long textual descriptions for > describing > > > the order of operations on components. Before publishing them I'd > prefer > > a > > > knowledgeable volunteer to review them to ensure they are accurate. > > > > > > Let me know if you're interested and I'll send you a copy. > > > > > > https://wiki.apache.org/cassandra/ArchitectureOverview > > > > I don't think the mailing list likes attachments, so throw them up on a > > web server somewhere and send the list link(s) to your diagrams. > > Alternatively, go ahead and post them on the wiki and ask for feedback. > > > > -- > > Kind regards, > > Michael > > >
Re: UML sequence diagrams on Wiki for explaining read/write path
Thanks for the feedback guys. I've made the updates. On 1 December 2015 at 00:56, Jack Krupansky wrote: > Great stuff! > > You wrote "When the replica node comes back online the coordinator node > will send the data to the replica node", which is partially true - if the > replica comes back online within the timeout window of three hours. So, you > probably want to say something like: > > "If the replica node comes back online within the hinted handoff window the > coordinator node will send the data to the replica node, otherwise the > replica node will need to be repaired." > > And maybe mention the configuration of the window. Change "The data is > stored for a default period of 3 hours" to "The data is stored for a > default period of 3 hours, configurable using the > max_hint_window_in_ms property > in cassandra.yaml." > > -- Jack Krupansky > > On Mon, Nov 30, 2015 at 2:24 AM, Michael Edge > wrote: > > > Write path docs updated on Wiki - please review diagram/text and let me > > have your comments (or update text in place). > > > > https://wiki.apache.org/cassandra/WritePathForUsers > > > > Cheers, > > > > Michael > > > > On 26 November 2015 at 11:25, Michael Shuler > > wrote: > > > > > On 11/25/2015 07:36 PM, Michael Edge wrote: > > > > I'd like to update the read/write path description on the wiki (see > > link > > > > below) by adding a couple of UML sequence diagrams I drew a while > ago. > > I > > > > think they are much better than long textual descriptions for > > describing > > > > the order of operations on components. Before publishing them I'd > > prefer > > > a > > > > knowledgeable volunteer to review them to ensure they are accurate. > > > > > > > > Let me know if you're interested and I'll send you a copy. > > > > > > > > https://wiki.apache.org/cassandra/ArchitectureOverview > > > > > > I don't think the mailing list likes attachments, so throw them up on a > > > web server somewhere and send the list link(s) to your diagrams. > > > Alternatively, go ahead and post them on the wiki and ask for feedback. > > > > > > -- > > > Kind regards, > > > Michael > > > > > >
FOSDEM 2016 - take action by 4th of December 2015
As most of you probably know FOSDEM 2016 (the biggest, 100% free open source developer conference) is right around the corner: https://fosdem.org/2016/ We hope to have an ASF booth and we would love to see as many ASF projects as possible present at various tracks (AKA Developer rooms): https://fosdem.org/2016/schedule/#devrooms This year, for the first time, we are running a dedicated Big Data and HPC Developer Room and given how much of that open source development is done at ASF it would be great to have folks submit talks to: https://hpc-bigdata-fosdem16.github.io While the CFPs for different Developer Rooms follow slightly different schedules, but if you submit by the end of this week you should be fine. Finally if you don't want to fish for CFP submission URL, here it is: https://fosdem.org/submit If you have any questions -- please email me *directly* and hope to see as many of you as possible in two months! Thanks, Roman.
Re: UML sequence diagrams on Wiki for explaining read/write path
Read Path ready for review: https://wiki.apache.org/cassandra/ReadPathForUsers On 1 December 2015 at 10:30, Michael Edge wrote: > Thanks for the feedback guys. I've made the updates. > > On 1 December 2015 at 00:56, Jack Krupansky > wrote: > >> Great stuff! >> >> You wrote "When the replica node comes back online the coordinator node >> will send the data to the replica node", which is partially true - if the >> replica comes back online within the timeout window of three hours. So, >> you >> probably want to say something like: >> >> "If the replica node comes back online within the hinted handoff window >> the >> coordinator node will send the data to the replica node, otherwise the >> replica node will need to be repaired." >> >> And maybe mention the configuration of the window. Change "The data is >> stored for a default period of 3 hours" to "The data is stored for a >> default period of 3 hours, configurable using the >> max_hint_window_in_ms property >> in cassandra.yaml." >> >> -- Jack Krupansky >> >> On Mon, Nov 30, 2015 at 2:24 AM, Michael Edge >> wrote: >> >> > Write path docs updated on Wiki - please review diagram/text and let me >> > have your comments (or update text in place). >> > >> > https://wiki.apache.org/cassandra/WritePathForUsers >> > >> > Cheers, >> > >> > Michael >> > >> > On 26 November 2015 at 11:25, Michael Shuler >> > wrote: >> > >> > > On 11/25/2015 07:36 PM, Michael Edge wrote: >> > > > I'd like to update the read/write path description on the wiki (see >> > link >> > > > below) by adding a couple of UML sequence diagrams I drew a while >> ago. >> > I >> > > > think they are much better than long textual descriptions for >> > describing >> > > > the order of operations on components. Before publishing them I'd >> > prefer >> > > a >> > > > knowledgeable volunteer to review them to ensure they are accurate. >> > > > >> > > > Let me know if you're interested and I'll send you a copy. >> > > > >> > > > https://wiki.apache.org/cassandra/ArchitectureOverview >> > > >> > > I don't think the mailing list likes attachments, so throw them up on >> a >> > > web server somewhere and send the list link(s) to your diagrams. >> > > Alternatively, go ahead and post them on the wiki and ask for >> feedback. >> > > >> > > -- >> > > Kind regards, >> > > Michael >> > > >> > >> > >
