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The "StorageConfiguration_0.7" page has been changed by zznate. http://wiki.apache.org/cassandra/StorageConfiguration_0.7?action=diff&rev1=2&rev2=3 -------------------------------------------------- thrift_framed_transport: false }}} == Memory, Disk, and Performance == + Access mode. mmapped i/o is substantially faster, but only practical on a 64bit machine (which notably does not include EC2 "small" instances) or relatively small datasets. "auto", the safe choice, will enable mmapping on a 64bit JVM. Other values are "mmap", "mmap_index_only" (which may allow you to get part of the benefits of mmap on a 32bit machine by mmapping only index files) and "standard". (The buffer size settings that follow only apply to standard, non-mmapped i/o.) + + {{{ + disk_access_mode: auto + }}} Buffer size to use when performing contiguous column slices. Increase this to the size of the column slices you typically perform. (Name-based queries are performed with a buffer size of !ColumnIndexSizeInKB.) {{{
