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| isviridov | Hello romainh, how are you today? | 11:10 |
|---|---|---|
| romainh | Hi isviridov, I'm fine thanks :) | 11:12 |
| romainh | I'm interested by magnetodb | 11:13 |
| isviridov | Interested in magnetodb? | 11:13 |
| romainh | yes | 11:13 |
| romainh | I like Cassandra and I think that magnetodb is necessary in the openstack environment | 11:14 |
| isviridov | romainh, good to know. | 11:15 |
| isviridov | Are you DBA, developer? | 11:15 |
| isviridov | How can I help you? | 11:15 |
| romainh | I'm a developer but I also worked for 4 years as Cassandra DBA | 11:17 |
| isviridov | WOW. Do you have expierence of multi dc replication configuration? | 11:17 |
| romainh | yes | 11:17 |
| romainh | In my past job, we ran Cassandra over 3 DC | 11:18 |
| romainh | We started developments with Cassandra 0.6 beta but we started production with 1.0 | 11:20 |
| romainh | Do you face any issues with multi DC replication? | 11:21 |
| isviridov | One of the features for kilo-1 in magnetodb is replication between dcs, your eyes and thougths whould be very useful. | 11:22 |
| romainh | I'd be glad to help :) | 11:25 |
| isviridov | rushiagr, great! I believe the specification will be discussed in ML and IRC meetings and I'll try to involve you. | 11:26 |
| isviridov | * rushiagr -> romainh | 11:27 |
| rushiagr | welcome romainh. Glad to see you :) | 11:27 |
| isviridov | Till then feel free to ask any questions here or in ML | 11:27 |
| rushiagr | see=meet :D | 11:27 |
| isviridov | rushiagr, good morning, sorry to disturbing ;) | 11:28 |
| romainh | hi rushiagr, nice to meet you too ;) | 11:28 |
| rushiagr | isviridov: no issues. I was already discussing Cassandra with my teammate, and was pondering over its limitations | 11:28 |
| rushiagr | :) | 11:28 |
| romainh | isviridov: ok. I have to dive into magnetodb's source code | 11:30 |
| rushiagr | romainh: If you have some time, I have some questions regarding Cassandra. Newbie questions really, so shouldn't be a big deal for you.. | 11:30 |
| isviridov | rushiagr, romainh would love to follow your conversation :) | 11:31 |
| rushiagr | isviridov: I think you too can help me. I'm way too behind w.r.t Cassandra basics :) | 11:32 |
| rushiagr | ok, so here are my questions. I am reading and finding out that in Cassandra, secondary index can only be of type 'hash', and not 'range' | 11:32 |
| rushiagr | They say create another column family (table), where row names are the values from the first 'table', which you want to index on. But if I am using randompartitioner, this won't help either! | 11:34 |
| rushiagr | #cassandra | 11:34 |
| rushiagr | woops :) | 11:34 |
| rushiagr | so, does that mean I cannot have secondary indexes based on a range? | 11:36 |
| rushiagr | =(range key index) | 11:36 |
| romainh | rushiagr: hmm first of all I'm not a big fan of secondary index. Do you have many many data? | 11:36 |
| romainh | *Do you plan to* have many many data? | 11:37 |
| rushiagr | romainh: let's say I will have a million or so 'items' (supercolumn) | 11:38 |
| rushiagr | I think that comes to 'many', but not 'many many' :) | 11:38 |
| rushiagr | but yes, let's say my data is going to huge | 11:39 |
| rushiagr | I'm fine with storing data in another columnfamily, and use that columnfamily as 'index' | 11:40 |
| rushiagr | but is it even possible to have 'randompartitioner' for one index, and 'ordered' one for another? | 11:40 |
| rushiagr | randompartitioner for one *columnfamily* and ordered one for another | 11:41 |
| romainh | no the partioner is defined by cluster | 11:43 |
| romainh | rushiagr: What are your needs? I'm not sure to understand why you need this | 11:46 |
| rushiagr | romainh: I was trying to map openstack APIs with a cassandra, or a magnetodb data model | 12:00 |
| rushiagr | e.g. say glance APIs | 12:01 |
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| rushiagr | 'glance list' has sorting, filters, pagination, and what not | 12:02 |
| rushiagr | or let's even forget about that. Amazon has local secondary indexes, based on range, and not hash | 12:05 |
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| openstackgerrit | Dmitriy Ukhlov proposed a change to stackforge/magnetodb: Improve json schema validation for requests left https://review.openstack.org/122445 | 13:59 |
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| openstackgerrit | Andrei V. Ostapenko proposed a change to stackforge/magnetodb: (WIP) "ALL_OLD" return_values for put_item https://review.openstack.org/121911 | 14:25 |
| openstackgerrit | Dmitriy Ukhlov proposed a change to stackforge/magnetodb: Improve json schema validation for requests left https://review.openstack.org/122445 | 14:58 |
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| openstackgerrit | Andrei V. Ostapenko proposed a change to stackforge/magnetodb: (WIP) "ALL_OLD" return_values for put_item https://review.openstack.org/121911 | 15:26 |
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| openstackgerrit | Dmitriy Ukhlov proposed a change to stackforge/magnetodb: Improve json schema validation for requests left https://review.openstack.org/122445 | 18:00 |
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