Method and device for writing stored data into storage medium based on flash memory

A system for writing data in a cluster of a plurality of host machines, each host machine comprising a plurality of hard drives, the system comprising one or more processors and a non-transitory computer-readable storage medium storing instructions executable by the one or more processors to cause the system to perform operations comprising:

• obtaining a plurality of erasing counts for the hard drives on each host machine of the host machines, wherein the erasing count for each hard drive of the hard drives equals a total count of erasing operations that have been performed on the hard drive;
• obtaining a total erasing count for each host machine of the host machines, wherein the total erasing count equals a sum of the erasing counts of the hard drives on the host machine;
• determining whether a ratio of a difference between a maximum erasing count of the plurality of host machines and a minimum erasing count of the plurality of host machines during a monitoring time period to an average of the total erasing counts of all of the host machines exceeds a threshold percentage;
• and
• in response to determining that the percentage exceeds the threshold percentage, migrating data from a first host machine that has the maximum erasing count to a second host machine that has the minimum erasing count.

A non-transitory computer-readable storage medium being configured with instructions executable by one or more processors to cause the one or more processors to perform operations for writing data in a cluster of a plurality of host machines, each host machine comprising a plurality of hard drives, the operations comprising:

• obtaining a plurality of erasing counts for the hard drives on each host machine of the host machines, wherein the erasing count for each hard drive of the hard drives equals a total count of erasing operations that have been performed on the hard drive;
• obtaining a total erasing count for each host machine of the host machines, wherein the total erasing count equals a sum of the erasing counts of the hard drives on the host machine;
• determining whether a ratio of a difference between a maximum erasing count of the plurality of host machines and a minimum erasing count of the plurality of host machines during a monitoring time period to an average of the total erasing counts of all of the host machines exceeds a threshold percentage;
• and
• in response to determining that the percentage exceeds the threshold percentage, migrating data from a first host machine that has the maximum erasing count to a second host machine that has the minimum erasing count.