File Structure for persisting history in a disk file (Comments please)

File Structure for persisting history in a disk file (Comments please)

[rajyalakshmi bommaraju]

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Hello,

I want to use the following file structure for persisting history in a 
disk file. Can you please send me your feedback about it.

Thanks
Raji Bommaraju

                                            _File structure for History 
Persistance_

History information will be stored in a disk file. The file will have a 
File Header consisting of "Bytes Stored" and "Head" for writing the next 
record.Each record stored will have record header and record data, 
record header has "record type" and "size of the record" (For Text 
messages the records will have variable length message data resulting in 
variable length records) hence this record structure is used.

*File Format:*

|File Header| Data |


File Header (8 bytes):

|Bytes stored | Head|
0                    4        8

*Data:*

|Record|Record|.....etc

*Record:*

|Record Header|Actual data|

*Record Header:*
Record Type: 1byte (voice call history - 0, text history- 1)
Size : Integer

Actual data: Will be voice call or text message information