chunk size for checksum when writing to disk

Hi all, Does anyone know the size of each chunk/block while appending it with a checksum when writing to the disk in Cassandra? Is it the standard 512 bytes or it varies? Thanks, Preetika

Performance improvement of Cassandra UDF/UDA

Hi All, I am new to the Cassandra community and thank you in advance for your kindly comments on an issue we met recently. We have found that running query with direct UDF execution is ten time more faster than the async UDF execution. The in-line comment: "Using async UDF execution is expens