***
title: "JobBufferStorageStrategy"
generated: true
---------------
This strategy defines where to store jobs that have been collected by a
[JobBuffer](/current/core/reference/typescript-api/job-queue/job-buffer#jobbuffer).
:::info
This is configured via the `jobQueueOptions.jobBufferStorageStrategy` property of
your VendureConfig.
:::
```ts title="Signature"
interface JobBufferStorageStrategy extends InjectableStrategy {
add(bufferId: string, job: Job): Promise;
bufferSize(bufferIds?: string[]): Promise<{ [bufferId: string]: number }>;
flush(bufferIds?: string[]): Promise<{ [bufferId: string]: Job[] }>;
}
```
* Extends: [`InjectableStrategy`](/current/core/reference/typescript-api/common/injectable-strategy#injectablestrategy)
### add
\
Job) => Promise<Job>`} />
Persist a job to the storage medium. The storage format should
take into account the `bufferId` argument, as it is necessary to be
able to later retrieve jobs by that id.
### bufferSize
\ Promise<{ [bufferId: string]: number }>`} />
Returns an object containing the number of buffered jobs arranged by bufferId.
Passing bufferIds limits the results to the specified bufferIds.
If the array is empty, sizes will be returned for *all* bufferIds.
*Example*
```ts
const sizes = await myJobBufferStrategy.bufferSize(['buffer-1', 'buffer-2']);
// sizes = { 'buffer-1': 12, 'buffer-2': 3 }
```
### flush
\ Promise<{ [bufferId: string]: Job[] }>`} />
Clears all jobs from the storage medium which match the specified bufferIds (if the
array is empty, clear for *all* bufferIds), and returns those jobs in an object
arranged by bufferId
*Example*
```ts
const result = await myJobBufferStrategy.flush(['buffer-1', 'buffer-2']);
// result = {
// 'buffer-1': [Job, Job, Job, ...],
// 'buffer-2': [Job, Job, Job, ...],
// };
```