Securing recorded data
A method, executed by a computer, for recording data includes splitting a file into sequential extents, reordering the sequential extents into non-sequential extents, writing the non-sequential extents to a storage medium, writing dummy data to the storage medium, and writing extent placement information corresponding to a placement for the non-sequential extents to the storage medium. A computer program product and computer system corresponding to the above method are also disclosed herein.
1. A computer-implemented method for securing recorded data, the method comprising:
splitting a file into a plurality of sequential extents, wherein the file is split in memory prior to the file being written;
reordering the plurality of sequential extents into a plurality of non-sequential extents;
writing the plurality of non-sequential extents to a storage medium;
writing extent placement information corresponding to a placement for the plurality of non-sequential extents to the storage medium, wherein the extent placement information is recorded in an index corresponding to the file, and wherein the index contains a file expiration time corresponding to the file; and
automatically deleting the file when the index is read at a time that is after the file expiration time.
2. The method of claim 1 , further comprising writing dummy data in between the non-sequential extents.
3. The method of claim 1 , wherein reordering the plurality of sequential extents into a plurality of non-sequential extents comprises reordering using an order determined by a pseudo-random number generator.
4. The method of claim 2 , wherein the dummy data is generated by using a pseudo-random number generator.
5. The method of claim 1 , wherein the file is stored in a Linear Tape File System format.
6. A computer system for securing recorded data, the computer system comprising:
one or more computer processors;
one or more computer readable storage media;
program instructions stored therein for execution by at least one of the one or more computer processors, the program instructions comprising instructions to:
split a file into a plurality of sequential extents, wherein the file is split in memory prior to the file being written;
reorder the plurality of sequential extents into a plurality of non-sequential extents;
write the plurality of non-sequential extents to a storage medium;
write extent placement information corresponding to a placement for the plurality of non-sequential extents to the storage medium, wherein the extent placement information is recorded in an index corresponding to the file, and wherein the index contains a file expiration time corresponding to the file; and
automatically delete the file when the index is read at a time that is after the file expiration time.
7. The computer system of claim 6 , further comprising instructions to write dummy data in between the non-sequential extents.
8. The computer system of claim 6 , wherein the instructions to reorder the plurality of sequential extents into a plurality of non-sequential extents comprise instructions to reorder using an order determined by a pseudo-random number generator.
9. The computer system of claim 7 , wherein the dummy data is generated by using a pseudo-random number generator.
10. The computer system of claim 6 , wherein the file is stored in a Linear Tape File System format.
11. A computer program product for securing recorded data, the computer program product comprising:
a computer readable storage medium and program instructions stored on the computer readable storage medium, the program instructions comprising instructions to:
split a file into a plurality of sequential extents, wherein the file is split in memory prior to the file being written;
reorder the plurality of sequential extents into a plurality of non-sequential extents;
write the plurality of non-sequential extents to a storage medium;
write extent placement information corresponding to a placement for the plurality of non-sequential extents to the storage medium, wherein the extent placement information is recorded in an index corresponding to the file, and wherein the index contains a file expiration time corresponding to the file; and
automatically delete the file when the index is read at a time that is after the file expiration time.
12. The computer program product of claim 11 , further comprising instructions to write dummy data in between the non-sequential extents.
13. The computer program product of claim 11 , wherein the instructions to reorder the plurality of sequential extents into a plurality of non-sequential extents comprise instructions to reorder using an order determined by a pseudo-random number generator.
14. The computer program product of claim 12 , wherein the dummy data is generated by using a pseudo-random number generator.