diff options
| -rw-r--r-- | docs/programming-guide.md | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/docs/programming-guide.md b/docs/programming-guide.md index 5d9df282ef..10f474f237 100644 --- a/docs/programming-guide.md +++ b/docs/programming-guide.md @@ -1214,9 +1214,11 @@ storage levels is: Compared to MEMORY_ONLY_SER, OFF_HEAP reduces garbage collection overhead and allows executors to be smaller and to share a pool of memory, making it attractive in environments with large heaps or multiple concurrent applications. Furthermore, as the RDDs reside in Tachyon, - the crash of an executor does not lead to losing the in-memory cache. In this mode, the memory + the crash of an executor does not lead to losing the in-memory cache. In this mode, the memory in Tachyon is discardable. Thus, Tachyon does not attempt to reconstruct a block that it evicts - from memory. + from memory. If you plan to use Tachyon as the off heap store, Spark is compatible with Tachyon + out-of-the-box. Please refer to this <a href="http://tachyon-project.org/master/Running-Spark-on-Tachyon.html">page</a> + for the suggested version pairings. </td> </tr> </table> |