-makeimg
Creates a new file using the physical file information.
Usage
ctutil -makeimg file image_string |
• file is the name of the c-tree file. The default file extension (that is ".dat" if not configured differently) must be omitted. Relative paths are resolved according to the c-tree server working directory.
• image_string has the following format:
MaxRecSize, MinRecSize, NumKeys, [ NumSegs, Dups [ SegSize, SegOffset ] ... ] ... |
Where:
o MaxRecSize is a five-digit number representing the maximum record length.
o MinRecSize is a five-digit number representing the minimum record length.
o NumKeys is a three-digit number representing the number of keys in the file.
o NumSegs is a two-digit number representing the number of segments in a key.
o Dups is a one-digit number representing the duplicate flag of a key. 0 means that duplicates are not allowed, 1 means that duplicates are allowed.
o SegSize is a three-digit number representing the size of a segment in a key.
o SegOffset is a five-digit number representing the offset of a segment in a key.
SegSize and SegOffset are repeated for each segment of the key
NumSegs, Dups and segments description are repeated for each key
Note - spaces in are shown to improve readability, they are not part of the format. Fields in the first pair of brackets are repeated for each key, fields in the second pair of brackets are repeated for each segment of the key.
Example - the following string applies to a file with a fixed record length of 108 bytes, a primary key composed of one segment of three bytes and an alternate key with duplicates composed of two segments, the first of two bytes in size and the second of three bytes in size:
00108,00108,002,01,0,003,00000,02,1,002,00003,003,00005 |