Efficient method for optimizing long-term retention backup policy within recovery point objectives (RPO)
A efficient method for long-term retention backup policy within recovery point objectives (RPO). Specifically, the disclosed method proposes a dynamic promotion scheme through which short-term retention backup copies, in compliance with specified long-term retention RPOs, may be promoted to render long-term retention backup copies. Further, the disclosed method not only looks to past and/or presently dated short-term retention backup copies, but also looks to prospective (or future) dated short-term retention backup copies, which are expected or predicted to be produced, for promotion. Moreover, in circumstances where there are no appropriate past, present, or future dated short-term retention backup copies to promote, the disclosed method triggers new backup operations to acquire the long-term retention backup copies necessary to maintain the specified long-retention RPOs.
1. A method for optimizing long-term retention backup policy, the method comprising:
performing a first search for a first current short-term retention asset copy;
computing a first forward duration based on the first search resulting in the first current short-term retention asset copy not being found;
obtaining, based on the first forward duration not exceeding a first long-term retention recovery point objective (RPO), a first backup operation prediction for a first next short-term retention backup operation; and
waiting, based on the first backup operation prediction forecasting that the first next short-term retention backup operation is most likely to succeed, for a first next short-term retention time interval during which a first next short-term retention asset copy is expected to be created through the first next short-term retention backup operation,
wherein the first next short-term retention asset copy is subsequently expected to be promoted to obtain a first current long-term retention asset copy.
2. The method of claim 1 , wherein the first forward duration reflects a length of time between an expected timestamp for the first next-short term retention time interval and a recorded timestamp for a last long-term retention asset copy.
3. The method of claim 1 , wherein the first long-term retention RPO defines a maximum length of time permitted to elapse between creations of consecutive long-term retention asset copies.
4. The method of claim 1 , the method further comprising:
performing a second search for a second current short-term retention asset copy; and
promoting, based on the second search resulting in the second current short-term retention asset copy being found, the second current short-term retention asset copy to obtain a second current long-term retention asset copy.
5. The method of claim 1 , the method further comprising:
performing a second search for a second current short-term retention asset copy;
computing a second forward duration based on the second search resulting in the second current short-term retention asset copy not being found;
obtaining, based on the second forward duration not exceeding a second long-term retention RPO, a second backup operation prediction for a second next short-term retention backup operation;
computing a backward duration based on the second backup operation prediction forecasting that the second next short-term retention backup operation is most likely to fail; and
promoting, based on the backward duration not exceeding the second long-term retention RPO, a last short-term retention asset copy to obtain a second current long-term retention asset copy.
6. The method of claim 5 , wherein the backward duration reflects a length of time between an expected timestamp for a next long-term retention time interval and a recorded timestamp for the last short-term retention asset copy.
7. The method of claim 1 , the method further comprising:
performing a second search for a second current short-term retention asset copy;
computing a second forward duration based on the second search resulting in the second current short-term retention asset copy not being found;
obtaining, based on the second forward duration not exceeding a second long-term retention RPO, a second backup operation prediction for a second next short-term retention backup operation;
computing a backward duration based on the second backup operation prediction forecasting that the second next short-term retention backup operation is most likely to fail; and
initiating, based on the backward duration exceeding the second long-term retention RPO, a long-term retention backup operation to obtain a second current long-term retention asset copy.
8. The method of claim 1 , the method further comprising:
performing a second search for a second current short-term retention asset copy;
computing a second forward duration based on the second search resulting in the second current short-term retention asset copy not being found;
computing a backward duration based on the second forward duration exceeding a second long-term retention RPO; and
promoting, based on the backward duration not exceeding the second long-term retention RPO, a last short-term retention asset copy to obtain a second current long-term retention asset copy.
9. The method of claim 1 , the method further comprising:
performing a second search for a second current short-term retention asset copy;
computing a second forward duration based on the second search resulting in the second current short-term retention asset copy not being found;
computing a backward duration based on the second forward duration exceeding a second long-term retention RPO; and
initiating, based on the backward duration exceeding the second long-term retention RPO, a long-term retention backup operation to obtain a second current long-term retention asset copy.
10. A non-transitory computer readable medium (CRM) comprising computer readable program code, which when executed by a computer processor, enables the computer processor to perform a method for optimizing long-term retention backup policy, the method comprising:
performing a first search for a first current short-term retention asset copy;
computing a first forward duration based on the first search resulting in the first current short-term retention asset copy not being found;
obtaining, based on the first forward duration not exceeding a first long-term retention recovery point objective (RPO), a first backup operation prediction for a first next short-term retention backup operation; and
waiting, based on the first backup operation prediction forecasting that the first next short-term retention backup operation is most likely to succeed, for a first next short-term retention time interval during which a first next short-term retention asset copy is expected to be created through the first next short-term retention backup operation,
wherein the first next short-term retention asset copy is subsequently expected to be promoted to obtain a first current long-term retention asset copy.
11. The non-transitory CRM of claim 10 , wherein the first forward duration reflects a length of time between an expected timestamp for the first next-short term retention time interval and a recorded timestamp for a last long-term retention asset copy.
12. The non-transitory CRM of claim 10 , wherein the first long-term retention RPO defines a maximum length of time permitted to elapse between creations of consecutive long-term retention asset copies.
13. The non-transitory CRM of claim 10 , wherein the method further comprises:
performing a second search for a second current short-term retention asset copy; and
promoting, based on the second search resulting in the second current short-term retention asset copy being found, the second current short-term retention asset copy to obtain a second current long-term retention asset copy.
14. The non-transitory CRM of claim 10 , wherein the method further comprises:
performing a second search for a second current short-term retention asset copy;
computing a second forward duration based on the second search resulting in the second current short-term retention asset copy not being found;
obtaining, based on the second forward duration not exceeding a second long-term retention RPO, a second backup operation prediction for a second next short-term retention backup operation;
computing a backward duration based on the second backup operation prediction forecasting that the second next short-term retention backup operation is most likely to fail; and
promoting, based on the backward duration not exceeding the second long-term retention RPO, a last short-term retention asset copy to obtain a second current long-term retention asset copy.
15. The non-transitory CRM of claim 14 , wherein the backward duration reflects a length of time between an expected timestamp for a next long-term retention time interval and a recorded timestamp for the last short-term retention asset copy.
16. The non-transitory CRM of claim 10 , wherein the method further comprises:
performing a second search for a second current short-term retention asset copy;
computing a second forward duration based on the second search resulting in the second current short-term retention asset copy not being found;
obtaining, based on the second forward duration not exceeding a second long-term retention RPO, a second backup operation prediction for a second next short-term retention backup operation;
computing a backward duration based on the second backup operation prediction forecasting that the second next short-term retention backup operation is most likely to fail; and
initiating, based on the backward duration exceeding the second long-term retention RPO, a long-term retention backup operation to obtain a second current long-term retention asset copy.
17. The non-transitory CRM of claim 10 , wherein the method further comprises:
performing a second search for a second current short-term retention asset copy;
computing a second forward duration based on the second search resulting in the second current short-term retention asset copy not being found;
computing a backward duration based on the second forward duration exceeding a second long-term retention RPO; and
promoting, based on the backward duration not exceeding the second long-term retention RPO, a last short-term retention asset copy to obtain a second current long-term retention asset copy.
18. The non-transitory CRM of claim 10 , wherein the method further comprises:
performing a second search for a second current short-term retention asset copy;
computing a second forward duration based on the second search resulting in the second current short-term retention asset copy not being found;
computing a backward duration based on the second forward duration exceeding a second long-term retention RPO; and
initiating, based on the backward duration exceeding the second long-term retention RPO, a long-term retention backup operation to obtain a second current long-term retention asset copy.
19. A system for optimizing long-term retention backup policy, the system comprising:
a backup storage system, comprising:
a computer processor; and
memory comprising instructions, which when executed by the computer processor, enables the computer processor to perform a method, the method comprising:
performing a search for a current short-term retention asset copy;
computing a forward duration based on the search resulting in the current short-term retention asset copy not being found;
obtaining, based on the forward duration not exceeding a long-term retention recovery point objective (RPO), a backup operation prediction for a next short-term retention backup operation; and
waiting, based on the backup operation prediction forecasting that the next short-term retention backup operation is most likely to succeed, for a next short-term retention time interval during which a next short-term retention asset copy is expected to be created through the next short-term retention backup operation,
wherein the next short-term retention asset copy is subsequently expected to be promoted to obtain a current long-term retention asset copy.
20. The system of claim 19 , the system further comprising:
a client device operatively connected to the backup storage system and comprising a client asset,
wherein the next short-term retention backup operation is expected to target the client asset.