The following table describes the types of dumps on your system.
| Crashdump Type | Description |
|---|---|
| Operating System (OS) dump | An OS dump is the unprocessed contents of memory at the time of an operating system crash. The content of the dump depends on your platform OS. An OS dump is the result of a single node OS crash and contains the entire contents of the memory of a node. It may also be referred to as a system dump, kernel dump, or node dump. On Linux, an OS dump is called a kernel panic dump. When an OS crash occurs, the node writes the contents of memory to a system dump area and restarts. An OS dump is typically the size of memory. An OS dump is independent of Teradata or any particular application. |
| Teradata Crashdump | A Teradata crashdump, also known as a PDE dump or simply crashdump, is a result of an unrecoverable Teradata error. When Teradata crashes, PDE on each node writes selective data to its own PDE dump directory, called a raw PDE dump. How much and which of this data is actually written also depends on the type of error. After the raw PDE dump is captured, Teradata restarts, but the system does not restart. |
| Snapshot Dump | A snapshot dump occurs when a process fails on a node and the failure does not cause a restart. PDE writes selective data to the dump directory, and then the database may abort or retry the request. |