search for: multiblock

...rforms large ios only to the logfiles. The ios to be datafiles are in smaller chunks. Hope this helps. Sunil I'd like to point out a small mistake in this post. Oracle most certainly performs large IOs to more than just logfiles. Parallel Query and normal foreground processes alike perform multiblock IO. They are known as direct path read and write, scattered read and others and are driven by full scans, index range scans, foreground temp segment IO, recovery and so on. Kevin Closson Chief Architect, Database Solutions PolyServe, Inc -------------- next part -------------- An HTML attachment...

My understanding is that if I "zfs set checksum=<different>" to change the algorithm that this will change the checksum algorithm for all FUTURE data blocks written, but does not in any way change the checksum for previously written data blocks. I need to corroborate this understanding. Could someone please point me to a document that states this? I have searched and searched

.../xfs/xfs.h index a8bfa93..65acd17 100644 --- a/core/fs/xfs/xfs.h +++ b/core/fs/xfs/xfs.h @@ -116,6 +116,9 @@ struct xfs_fs_info; #define XFS_DIR2_NULL_DATAPTR ((uint32_t)0) +#define XFS_DIR3_BLOCK_MAGIC 0x58444233 /* XDB3: single block dirs */ +#define XFS_DIR3_DATA_MAGIC 0x58444433 /* XDD3: multiblock dirs */ + /* File types and modes */ #define S_IFMT 00170000 #define S_IFSOCK 0140000 @@ -346,8 +349,19 @@ typedef struct xfs_dinode { /* di_next_unlinked is the only non-core field in the old dinode */ uint32_t di_next_unlinked;/* agi unlinked list ptr */ - uint8_t di_litera...

...stem/ag */ + +/* Magic numbers */ +#define XFS_AGI_MAGIC "XAGI" +#define XFS_IBT_MAGIC "IABT" +#define XFS_DINODE_MAGIC "IN" + +#define XFS_DIR2_BLOCK_MAGIC 0x58443242U /* XD2B: single block dirs */ +#define XFS_DIR2_DATA_MAGIC 0x58443244U /* XD2D: multiblock dirs */ +#define XFS_DIR2_FREE_MAGIC 0x58443246U /* XD2F: free index blocks */ + +#define XFS_DIR2_NULL_DATAPTR ((uint32_t)0) + +/* File types and modes */ +#define S_IFMT 00170000 +#define S_IFSOCK 0140000 +#define S_IFLNK 0120000 +#define S_IFREG 0100000 +#define S_IFBLK 006000...