Newbie to cassandra

2010-07-18 Thread sonia gehlot
Hi everyone, I am new to Cassandra and wanted to try and start learning Cassandra. I have database background. I am fully exposed and have full command on Netezza, Oracle, MySQL, Sybase, SQL etc basically all the relational databases. As Cassandra is gaining popularity day by day by its amazing f

can you list and explain the different caches?

2010-07-18 Thread Miriam Allalouf
Hi, Cassandra documentation mention several caches that are used when coming to retrieve a key / column as follows Row or key cache, Bloom Filter for key existence, column index cache, sstable index file , I want to estimate lookups complexity and need detailed read I/O path. I found that some o

Re: GC Storm

2010-07-18 Thread Peter Schuller
(adding dev@) > (2) Can we implement multi-thread compaction? I think this is the only way to scale. Or at least to implement concurrent compaction (whether it is by division into threads or not) of multiple size classes. As long as the worst-case compactions are significantly slower than best-ba