Add exponential backoff and some retries when posting item attachments.
Manual testing was showing upwards of 50 retries in some cases when
~250-300 attachments total were being added. Of the retries, none
were at the max amount. However, all tests were for relatively small
datasets
---
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#### Type of change
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#### Test Plan
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Adds a skip condition for emails that can be enumerated but are not returned from the server (Exchange) because
it believes they are corrupt/invalid.
This handles the `ErrorInvalidRecipients` condition we believe is hit when exchange finds an email that pre-dates
M365 mailbox creation (either a server corruption or triggered by on-prem->M365 migration)
---
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this is needed to standardize the presence of a path prefix in all test-helper trees, so that we can use standard test factory helpers for producing complete post-process data.
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#### Issue(s)
* #4689
#### Test Plan
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started down the path of changing behavior under error conditions involving server-side nil reference errors. Issue turned out to be transient. I'm commiting the cleanup without the error case handling.
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As the tittle suggests. Adding this call to the middleware used by clients.
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- [x] ⚡ Unit test
- [x] 💚 E2E - added CI test
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Turns out the root ID name isn't an appropriate match for establishing the root node. Instead, the backup hander is now extended with a getRootFolder method and will pass the expected root folder ID into the tree's constructor func to ensure we establish the correct root node.
---
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#### Type of change
- [x] 🐛 Bugfix
#### Issue(s)
* #4689
#### Test Plan
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Allows the caller to get Team information if they know a group is a team.
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#### Type of change
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Matches a specific error message returned by graph when an account does not have support for microsoft teams.
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- [x] 🐛 Bugfix
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<!-- PR description-->
Switch to using `custom.DriveItem` instead of `models.DriveItemable` during backups. There is a slight impact to restore as well, since backup and restore both use a few common interfaces e.g. `AugmentItemInfo`.
---
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Add a `custom.DriveItem` struct which partially replicates `DriveItemable` and only stores the fields corso makes use of during a backup operation.
Sorry about the PR size, I don't have a way to split this into multiple PRs. Also it should be trivial to review because it's simply copying over fields to another struct.
---
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Add the required wiring for SDK consumers to set the min epoch duration
(and eventually other persistent config info). This is just boiler-plate
with some tests at the various layers to make sure that layer is run as
expected. More nuanced tests about setting various config values are
left to the code in `internal/kopia/conn_test.go`
---
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- [x] ⛔ No
#### Type of change
- [x] 🌻 Feature
- [ ] 🐛 Bugfix
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#### Issue(s)
* #4782
#### Test Plan
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- [x] ⚡ Unit test
- [ ] 💚 E2E
<!-- PR description-->
1. Move cache miss logs to debug, as it can be chatty sometimes. We will leverage the end of operation `URLCacheMiss` counter to get this information instead.
2. Counter renaming.
---
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This PR lays the groundwork for changing persistent config info in
kopia. Specifically, it allows setting the minimum epoch duration (but
does so in a generic manner that can be expanded on later)
This PR only adds the code to actually do the configuration, it doesn't
add wiring to make this new function available to other callers
---
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#### Issue(s)
* #4782
#### Test Plan
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- [x] ⚡ Unit test
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<!-- PR description-->
We are not making use of `GetSharepointIds()` anymore. It was removed a month back, see [PR](https://github.com/alcionai/corso/pull/4436/files#diff-fc955b9b2e400cdda711ab2b6bf459845369691c5abc3973bbfaa1c83a664688L43). So we don't need to fetch this per item-property from graph during delta queries.
This will reduce overall mem usage since we don't need to store references to the sharepoint id map. It can also make delta queries go slightly faster since we are transferring & processing fewer bytes over network.
---
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now that folder handling is complete, we can ingest items in the delta tree as well.
---
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#### Issue(s)
* #4689
#### Test Plan
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`resp` is nil if there's an error and `getGroupFromResponse` will panic.
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Makes modifications to the groups handlers to facilitate the incoming introduction of conversations backup handling. Changes include:
* new handler methods (canMakeDeltas and LocationRef)
* binding handlers to generics
* some naming normalization
---
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#### Type of change
- [x] 🌻 Feature
#### Issue(s)
* #4536
#### Test Plan
- [x] ⚡ Unit test
- [x] 💚 E2E
there are certain enumeration cases where tombstoning isn't the correct behavior, and we want to delete a folder from the tree entirely. This primarily occurrs when we have a create->delete pair of markers either within or across enumerations.
---
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#### Type of change
- [ ] 🌻 Feature
#### Issue(s)
* #4689
#### Test Plan
- [x] ⚡ Unit test
<!-- PR description-->
We use kiota retry handlers for 503 and 504 retries. We have a request from SDK users to configure number of retry attempts for 5xx errors. We already have configurability around retry attempts, plumbing it through to kiota retry handler.
---
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Switch to configurable retries/timeouts/backoffs. Set up PR for https://github.com/alcionai/corso/pull/4750/files testing.
With configurable retries, we can cut down the `TestRetryMiddleware_RetryResponse_maintainBodyAfter503` runtime from ~40seconds to around 1-2 seconds in the following PR #4750
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---
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#### Type of change
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#### Issue(s)
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* closes https://github.com/alcionai/corso/issues/4652
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---
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begins implementation of the drive delta tree support by adding boilerplate funcs for getting the backup data, and adding a framework of unit tests that will be used bring testing parity up to par with current tests.
---
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#### Issue(s)
* #4689
#### Test Plan
- [x] ⚡ Unit test
Switch restore code path to use service-level handlers. Does a few
things:
* switches existing service-level functions to be methods on
service-level handlers
* update interfaces as necessary
* moves some logic from old controller-level restore function to either
the new handlers or the operation-level function
* removes old code
May be easiest to review by commit
---
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#### Type of change
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#### Issue(s)
* #4254
#### Test Plan
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- [x] ⚡ Unit test
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<!-- PR description-->
Adds regression tests for query params & headers used for delta/non delta requests. Closes https://github.com/alcionai/corso/issues/4614
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#### Issue(s)
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* https://github.com/alcionai/corso/issues/4614
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Add logic and tests for preview backups in drive-backed services.
Does slightly change a few of the options for preview backup limits
---
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#### Type of change
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#### Test Plan
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- [x] ⚡ Unit test
- [ ] 💚 E2E
three changes
1. bumps the xsync package to v3
2. creates a common package for synced maps
3. replaces all xsync MapOf imports with the new common/syncd package.
---
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#### Test Plan
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This completes the wiring for Exchange preview backups. A few notable
points:
* Adds new config substruct(?) for limits on items/data
* Adds "reasonable defaults" (very small) for Exchange data categories
* Adds "important" and "skip" containers for Exchange data categories
All the above can be tweaked as we determine what values work best
Manually tested
1. regular backup
2. preview backup
3. regular backup
Verified that no merge base is used for the preview backup and the
merge base made in (1) is used for the backup in (3)
This feature is not exposed via CLI
May be easiest to review by commit
---
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#### Type of change
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#### Issues
Merge after:
* #4657
* #4607
#### Test Plan
- [x] 💪 Manual
- [x] ⚡ Unit test
- [ ] 💚 E2E
sdk consumers need a way to configure the graph api client options when using the services api. This is the first in a two-part change to expose those options. This step moves the api to a client-based set of methods instead of free functions. The next step will add client configuration to the service client.
---
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#### Type of change
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#### Test Plan
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A handful of the error sentinel values in graph/errors.go were only around to comply with an old expectation that IsErr funcs have a matching sentinel. That assumption is out of date, and there's no point in keeping around unused sentinels.
This PR makes three changes to clean up that issue:
1. remove unused sentinels (unused is qualifed as "not produced").
2. fix external pacakges which referenced those errors in tests alone by replacing those sentinels with odata errors.
3. centralize odata error test code to help support upstream package odata error creation.
---
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#### Type of change
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#### Test Plan
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Increase proliferation of the count bus to record runtime stats.
---
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#### Type of change
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#### Test Plan
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Previously we were printing a table for a single item which, for one
was unnecessary, but this also make the output of a backup more
compact.
Before:
```
Logging to file: /home/meain/.cache/corso/logs/2023-10-20T10-21-23Z.log
Connecting to M365 done
Connecting to repository 1s done
Backing Up ∙ Teams Testing (meain)
Discovering items to backup 27s done
Libraries (TeamsTestingmeain) done (found 0 items)
Libraries (TeamsTestingmeain-Shared0) done (found 0 items)
Libraries (TeamsTestingmeain-Private2) done (found 0 items)
Messages 7s done (found 6 channels)
Backing up data 7s done
Backup complete ∙ 7b40dd40-f808-4d57-8e39-b4553e48dc5d
ID Bytes Uploaded Items Uploaded Items Skipped Errors
7b40dd40-f808-4d57-8e39-b4553e48dc5d 0 B 0 0 0
Completed Backups:
ID Started At Duration Status Resource Owner
7b40dd40-f808-4d57-8e39-b4553e48dc5d 2023-10-20T10:21:32Z 36.632747912s Completed Teams Testing (meain)
```
After:
```
Connecting to M365 done
Connecting to repository 1s done
Backing Up ∙ Teams Testing (meain)
Discovering items to backup 31s done
Libraries (TeamsTestingmeain) done (found 0 items)
Libraries (TeamsTestingmeain-Shared0) done (found 0 items)
Libraries (TeamsTestingmeain-Private2) done (found 0 items)
Messages 9s done (found 6 channels)
Backing up data 7s done
Backup complete ∙ ffb2f619-1cb7-4a11-b3e2-7300aa513c6a
Bytes Uploaded: 0 B | Items Uploaded: 0 | Items Skipped: 0 | Errors: 0
Completed Backups:
ID ID Started At Duration Status Resource Owner
ffb2f619-1cb7-4a11-b3e2-7300aa513c6a 2023-10-20T10:23:35Z 40.096203016s Completed Teams Testing (meain)
```
---
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This commit include a few things that improves the progresbars and other info messages are printed out during the CLI run.

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<!-- PR description-->
2nd last PR in the chain. Wires up the new sliding limiter into exchange backup create flows. I'll add some e2e regression tests to wrap it up.
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this is an alternative possible response from graph api when the client is updating the token in-flight. We normally catch this for item downloads, but are defaulting on permission downloads.
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Move the token bucket limiter (`rate.Limiter`) package behind a corso owned `Limiter` interface. This allows callers to request tokens without knowing what type of limiter they are waiting on.
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replace all cases of new|wrap|stack(...).WithClues(ctx) with the flattened new|wrap|stackWC(ctx, ...) functions introduced in the latest clues bump.
Other changes added:
* remove WithClues builders when the error producer already called it.
* corrected some usages of ictx within loops.
no logic changes, just cleanup.
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Allow callers of GetAddedRemovedItems to set the number of added items
they'd like returned from the call. Will eventually be leveraged for
Exchange preview backups
Doesn't change existing limits for pagers since everything uses the
default of zero for "get everything"
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<!-- PR description-->
Add a killswitch for sliding window limiter. This is only relevant for exchange backups Setting this flag switches exchange backups to use the default token bucket rate limiter.
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Wrapper for existing graph.ContainerResolver structs that returns items
in priority order in the Items() function. Also has logic to filter out
containers if desired
This can help with things like preview backups where we only want to
backup a subset of items because it allows us to ensure we'll see the
containers we care about most first
---
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<!-- PR description-->
Concurrency limiter is stable and has been in use since several months. We had added a killswitch to disable it for safety reasons. It's not being used by SDK consumers, and hidden in corso cli.
This PR removes the `--disable-concurrency-limiter` flag & associated control option.
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Some code (e.x. Exchange) continues to use the results from a pager even
in the event some errors occur. These tests help ensure we have
consistent return values when we see an error during enumeration
---
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Enable user/client to be able to perform multiple backups in a concurrent manner irrespective of storage provider (s3/filesystem) for different tenants (anything that differentiates one account from another).
#### Does this PR need a docs update or release note?
- [ ] ✅ Yes, it's included
- [x] 🕐 Yes, but in a later PR
- [ ] ⛔ No
#### Type of change
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- [x] 🐛 Bugfix
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#### Issue(s)
* #4443
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#### Does this PR need a docs update or release note?
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- [ ] 🕐 Yes, but in a later PR
- [x] ⛔ No
#### Type of change
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- [x] 🐛 Bugfix
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#### Test Plan
- [x] 💪 Manual
- [ ] ⚡ Unit test
- [ ] 💚 E2E