Sorry for my late reply and thanks for this Jagdeep! Unfortunately I have a
conflict at that time. If you end up scheduling another one, keep us
posted.

I still feel fairly strongly that adding a new field vs overriding is the
right thing to do.
I think generally CSN is better vs opaque IDs in the general case, however
there is potentially a benefit to allowing the client to set a (unique)
opaque id identifying a version rather than delegating the responsibility
to the catalog. In CDC-like settings (imagine capturing postgres->iceberg)
if you have different syncers for different tables, transactions are
already globally ordered in postgres through LSN. If writers could use the
LSN to globally identify a "transaction" you could have uncoordinated
writers still mapping to the same logical timeline. This is appealing for
my use case (in an inherently streaming setting) but I am not sure it's a
compelling enough option to adopt writ large.

I recently gained access to slack so I am happy to additionally
coordinate/chat there.

Best
Dov

On Wed, Dec 10, 2025 at 4:08 PM Jagdeep Sidhu <[email protected]>
wrote:

> Hi,
>
> I have responded to comments in the doc and made fixes/clarifications:
> https://docs.google.com/document/d/1jr4Ah8oceOmo6fwxG_0II4vKDUHUKScb
>
> Two main changes:
>
> 1. Updated the sequence diagram for CSN approach to show that client is
> filtering the snapshots using CSN and remembering CSN in its Transaction
> context. That way the catalog is not resolving tables to right versions per
> transaction.
> 2. Update the preferred way to get CSN by piggybacking on LoadTables API
> call.
>
> I have set up a follow up meeting to discuss this topic at 9AM PST on
> December 18, 2025. Hoping that folks can join in to provide feedback. Happy
> to schedule more in different timezones.
>
> Two high level contention points that we need to discuss:
> a) Using sequence numbers and doing filtering on client side versus using
> Opaque IDs that Catalog resolves. In the last meeting there were opinions
> on each side.
> b) Adding a new field for CSN or repurposing existing timestamp field (by
> overriding it on catalog side). CSN versus CAT approaches.
>
>
> -Jagdeep
>
> On Thu, Nov 20, 2025 at 4:29 PM Jagdeep Sidhu <[email protected]>
> wrote:
>
>> Thanks for the feedback Ryan and Dov. Agree that overriding and reusing
>> timestamps is not good - it is backwards incompatible change. I can rework
>> the CSN proposal and send an updated version on this email thread for
>> further discussion.
>>
>> Dov (and others), do you have feedback on the CSN proposal, described in
>> Option 1 in:
>> https://docs.google.com/document/d/1jr4Ah8oceOmo6fwxG_0II4vKDUHUKScb
>>
>> We can also collaborate on updating the CSN proposal via Slack as well
>> and then organize a meeting to get feedback/discuss further.
>>
>> Thank you!
>> -Jagdeep
>>
>> On Sun, Nov 9, 2025 at 2:14 PM Ryan Blue <[email protected]> wrote:
>>
>>> v4 is a revision of the file spec, not the catalog spec so it's
>>> unrelated. I would recommend just proposing changes to the REST catalog
>>> spec and building consensus around how it would work. We typically want to
>>> have an implementation in Java to demonstrate the feature before finalizing
>>> and voting to adopt the changes.
>>>
>>> On Sun, Nov 9, 2025 at 1:53 PM Dov Alperin
>>> <[email protected]> wrote:
>>>
>>>> That generally aligns with my sensibilities as well (avoiding
>>>> overriding existing fields' meaning). The fact that adding a CSN requires
>>>> changes to the spec is notable. What's the process that would be required
>>>> to get that landed in v4?
>>>>
>>>> On Sun, Nov 9, 2025 at 2:40 PM Ryan Blue <[email protected]> wrote:
>>>>
>>>>> I am fairly strongly opposed to repurposing the timestamp field for
>>>>> this. To move forward, I'd recommend working on catalog sequence numbers.
>>>>>
>>>>> On Sat, Nov 8, 2025 at 6:54 PM Dov Alperin
>>>>> <[email protected]> wrote:
>>>>>
>>>>>> Hi Iceberg community!
>>>>>> (I initially opened this message as it's own thread in error, sorry
>>>>>> about that)
>>>>>> I’m curious where this proposal landed? I work at Materialize
>>>>>> <http://materialize.com/> and we are keenly interested both in
>>>>>> seeing this
>>>>>> proposal come to fruition but possibly also helping to implement it.
>>>>>>
>>>>>> I see there was a call in May, but I’m not sure what the conclusion
>>>>>> was. As
>>>>>> spec v4 nears closer, I am curious which of the two proposals the
>>>>>> community
>>>>>> favors here?
>>>>>>
>>>>>> Best,
>>>>>> Dov
>>>>>>
>>>>>> On Tue, May 27, 2025 at 01:09:05AM -0700, Maninderjit Singh wrote:
>>>>>> > Forgot to attach a link to the update proposal
>>>>>> > <
>>>>>> https://docs.google.com/document/d/1KVgUJc1WgftHfLz118vMbEE7HV8_pUDk4s-GJFDyAOE/edit?pli=1&tab=t.0#heading=h.ypbwvr181qn4
>>>>>> >
>>>>>> > .
>>>>>> >
>>>>>> > On Tue, May 27, 2025 at 1:06 AM Maninderjit Singh <
>>>>>> > [email protected]> wrote:
>>>>>> >
>>>>>> > > Hi community,
>>>>>> > >
>>>>>> > >  I have updated the proposal with both the options (overwriting
>>>>>> existing
>>>>>> > > timestamps-ms vs introducing a new sequence/timestamp field) as
>>>>>> we have
>>>>>> > > initial consensus on using catalog authored sequence/timestamp.
>>>>>> Jagdeep,
>>>>>> > > please review to ensure that the options are correctly captured.
>>>>>> I have
>>>>>> > > also added additional arguments on why we can't assume timestamp
>>>>>> to be
>>>>>> > > "informational" since it's being used in critical paths and
>>>>>> > > incorrect values can take the table offline.
>>>>>> > >
>>>>>> > > Also, I'm moving the meeting to Thursday to better accommodate
>>>>>> conflicts.
>>>>>> > > I would also record the meeting in case anyone misses and is
>>>>>> interested in
>>>>>> > > the discussion.
>>>>>> > >
>>>>>> > > Sync for iceberg multi-table transactions
>>>>>> > > Thursday, May 29 · 9:00 – 10:00am
>>>>>> > > Time zone: America/Los_Angeles
>>>>>> > > Google Meet joining info
>>>>>> > > Video call link: https://meet.google.com/ffc-ttjs-vti
>>>>>> > >
>>>>>> > > Thanks,
>>>>>> > > Maninder
>>>>>> > >
>>>>>> > >
>>>>>> > >
>>>>>> > > On Mon, May 26, 2025 at 12:47 AM Péter Váry <
>>>>>> [email protected]>
>>>>>> > > wrote:
>>>>>> > >
>>>>>> > >> I'm interested, but can't be there, but please record the
>>>>>> meeting.
>>>>>> > >> Thanks,
>>>>>> > >> Peter
>>>>>> > >>
>>>>>> > >> Maninderjit Singh <[email protected]> ezt írta
>>>>>> (időpont:
>>>>>> > >> 2025. máj. 24., Szo, 2:30):
>>>>>> > >>
>>>>>> > >>> Hi dev community,
>>>>>> > >>> I was wondering if we could join a call next week for
>>>>>> discussing the
>>>>>> > >>> multi-table transactions so we can make progress. I have shared
>>>>>> a meeting
>>>>>> > >>> invite where anyone who's interested in the discussion can
>>>>>> join. Please let
>>>>>> > >>> me know if this works.
>>>>>> > >>>
>>>>>> > >>> Thanks,
>>>>>> > >>> Maninder
>>>>>> > >>>
>>>>>> > >>> Sync for iceberg multi-table transactions
>>>>>> > >>> Friday, May 30 · 9:00 – 10:00am
>>>>>> > >>> Time zone: America/Los_Angeles
>>>>>> > >>> Google Meet joining info
>>>>>> > >>> Video call link: https://meet.google.com/ffc-ttjs-vti
>>>>>> > >>>
>>>>>> > >>>
>>>>>> > >>> On Wed, May 21, 2025 at 10:25 AM Maninderjit Singh <
>>>>>> > >>> [email protected]> wrote:
>>>>>> > >>>
>>>>>> > >>>> Hi dev community,
>>>>>> > >>>> Following up on the thread here to continue the discussion and
>>>>>> get
>>>>>> > >>>> feedback since we couldn't get to it in sync. I think we have
>>>>>> made some
>>>>>> > >>>> progress in the discussion that I want to capture while
>>>>>> highlighting the
>>>>>> > >>>> items where we need to create consensus along with pros and
>>>>>> cons. I would
>>>>>> > >>>> need help to add clarity and to make sure the arguments are
>>>>>> captured
>>>>>> > >>>> correctly.
>>>>>> > >>>>
>>>>>> > >>>> *Things we agree on*
>>>>>> > >>>>
>>>>>> > >>>>    1. Don't maintain server side state for tracking the
>>>>>> transactions.
>>>>>> > >>>>    2. Need global (catalog-wide) ordering of snapshots via some
>>>>>> > >>>>    (hybrid/logical) clock/CSN
>>>>>> > >>>>    3. Optionally expose the catalog's clock/CSN information
>>>>>> without
>>>>>> > >>>>    changing how tables load
>>>>>> > >>>>    4. Loading consistent snapshot across multiple tables and
>>>>>> > >>>>    repeatable reads based on the reference clock/CSN
>>>>>> > >>>>
>>>>>> > >>>>
>>>>>> > >>>> *Things we disagree on*
>>>>>> > >>>>
>>>>>> > >>>>    1. Reuse existing timestamp field vs introduce a new field
>>>>>> CSN
>>>>>> > >>>>
>>>>>> > >>>>
>>>>>> > >>>> *Reusing timestamp field approach*
>>>>>> > >>>>
>>>>>> > >>>>    - Pros:
>>>>>> > >>>>
>>>>>> > >>>>
>>>>>> > >>>>    1. Backwards compatibility, no change to table metadata
>>>>>> spec so
>>>>>> > >>>>    could be used by existing v2 tables.
>>>>>> > >>>>    2. Fixes existing time travel and ordering issues
>>>>>> > >>>>    3. Simplifies and clarifies the spec (no new id for
>>>>>> snapshots)
>>>>>> > >>>>    4. Common notion of timestamp that could be used to
>>>>>> evaluate causal
>>>>>> > >>>>    relationships in other proposals like events or commit
>>>>>> reports.
>>>>>> > >>>>
>>>>>> > >>>>
>>>>>> > >>>>    - Cons
>>>>>> > >>>>
>>>>>> > >>>>
>>>>>> > >>>>    1. Unique timestamp generation in milliseconds. Potential
>>>>>> > >>>>    mitigations:
>>>>>> > >>>>
>>>>>> https://docs.google.com/document/d/1KVgUJc1WgftHfLz118vMbEE7HV8_pUDk4s-GJFDyAOE/edit?pli=1&disco=AAABjwaxXeg
>>>>>> > >>>>    2. Concerns about client side timestamp being overridden.
>>>>>> > >>>>
>>>>>> > >>>> *Adding new CSN field*
>>>>>> > >>>>
>>>>>> > >>>>    - Pros:
>>>>>> > >>>>
>>>>>> > >>>>
>>>>>> > >>>>    1. Flexibility to use logical or hybrid clocks. Not sure how
>>>>>> > >>>>    clients can generate a hybrid clock timestamp here without
>>>>>> suffering from
>>>>>> > >>>>    clock skew (Would be good to clarify this)?
>>>>>> > >>>>    2. No client side overriding concerns.
>>>>>> > >>>>
>>>>>> > >>>>
>>>>>> > >>>>    - Cons:
>>>>>> > >>>>
>>>>>> > >>>>
>>>>>> > >>>>    1. Not backwards compatible, requires new field in table
>>>>>> metadata
>>>>>> > >>>>    so need to wait for v4
>>>>>> > >>>>    2. Does not fix time travel and snapshot-log ordering issues
>>>>>> > >>>>    3. Adds another id for snapshots that clients need to
>>>>>> generate and
>>>>>> > >>>>    reason about.
>>>>>> > >>>>    4. Could not be extended to use in other proposals for
>>>>>> causal
>>>>>> > >>>>    reasoning.
>>>>>> > >>>>
>>>>>> > >>>>
>>>>>> > >>>> Thanks,
>>>>>> > >>>> Maninder
>>>>>> > >>>>
>>>>>> > >>>> On Tue, May 20, 2025 at 8:16 PM Maninderjit Singh <
>>>>>> > >>>> [email protected]> wrote:
>>>>>> > >>>>
>>>>>> > >>>>> Appreciate the feedback on the "catalog-authored timestamp"
>>>>>> document
>>>>>> > >>>>> <
>>>>>> https://docs.google.com/document/d/1KVgUJc1WgftHfLz118vMbEE7HV8_pUDk4s-GJFDyAOE/edit?pli=1&tab=t.0
>>>>>> >
>>>>>> > >>>>> !
>>>>>> > >>>>>
>>>>>> > >>>>> Ryan, I don't think we can get consistent time travel queries
>>>>>> in
>>>>>> > >>>>> iceberg without fixing the timestamp field since it's what
>>>>>> the spec
>>>>>> > >>>>> <
>>>>>> https://iceberg.apache.org/spec/#point-in-time-reads-time-travel>
>>>>>> > >>>>> prescribes for time travel. Hence I took the liberty to
>>>>>> re-use it for the
>>>>>> > >>>>> catalog timestamp which ensures that snapshot-log is
>>>>>> correctly ordered for
>>>>>> > >>>>> time travel.  Additionally, the timestamp field needs to be
>>>>>> fixed to avoid
>>>>>> > >>>>> breaking commits to the table due to accidental large skews
>>>>>> as per current
>>>>>> > >>>>> spec, the scenario is described in detail here
>>>>>> > >>>>> <
>>>>>> https://docs.google.com/document/d/1KVgUJc1WgftHfLz118vMbEE7HV8_pUDk4s-GJFDyAOE/edit?pli=1&tab=t.0#bookmark=id.6avx66vzo168
>>>>>> >
>>>>>> > >>>>> .
>>>>>> > >>>>> The other benefit of reusing the timestamp field is spec
>>>>>> simplicity
>>>>>> > >>>>> and clarity on timestamp generation responsibilities without
>>>>>> requiring the
>>>>>> > >>>>> need to manage yet another identifier (in addition to
>>>>>> sequence number,
>>>>>> > >>>>> snapshot id and timestamp) for snapshots.
>>>>>> > >>>>>
>>>>>> > >>>>> Jagdeep, your concerns about overriding the timestamp field
>>>>>> are valid
>>>>>> > >>>>> but the reason I'm not too worried about it is because client
>>>>>> can't assume
>>>>>> > >>>>> a commit is successful without their response being
>>>>>> acknowledged by the
>>>>>> > >>>>> catalog which returns the CommitTableResponse
>>>>>> > >>>>> <
>>>>>> https://github.com/apache/iceberg/blob/c2478968e65368c61799d8ca4b89506a61ca3e7c/open-api/rest-catalog-open-api.yaml#L3997>
>>>>>> with
>>>>>> > >>>>> new metadata (that has catalog authored timestamps in the
>>>>>> proposal). I'm
>>>>>> > >>>>> happy to work with you to put something common together and
>>>>>> get the best
>>>>>> > >>>>> out of the proposals.
>>>>>> > >>>>>
>>>>>> > >>>>> Thanks,
>>>>>> > >>>>> Maninder
>>>>>> > >>>>>
>>>>>> > >>>>>
>>>>>> > >>>>>
>>>>>> > >>>>>
>>>>>> > >>>>> On Tue, May 20, 2025 at 5:48 PM Jagdeep Sidhu <
>>>>>> [email protected]>
>>>>>> > >>>>> wrote:
>>>>>> > >>>>>
>>>>>> > >>>>>> Thank you Ryan, Maninder and the rest of the community for
>>>>>> feedback
>>>>>> > >>>>>> and ideas!
>>>>>> > >>>>>> Drew and I will take another pass and remove the catalog
>>>>>> > >>>>>> co-ordination requirement for LoadTable API, and bring the
>>>>>> proposal closer
>>>>>> > >>>>>> to "catalog-authored timestamp" in the sense that clients
>>>>>> can use CSN to
>>>>>> > >>>>>> find the right snapshot, but still leave upto Catalog on
>>>>>> what it want to
>>>>>> > >>>>>> use for CSN (Hybrid clock timestamp or another monotonically
>>>>>> increasing
>>>>>> > >>>>>> number).
>>>>>> > >>>>>>
>>>>>> > >>>>>> If more folks have feedback, please leave it in the doc or
>>>>>> email
>>>>>> > >>>>>> list, so we can address it as well in the document update.
>>>>>> > >>>>>>
>>>>>> > >>>>>> Maninder, one reason we proposed a new field for
>>>>>> CommitSequenceNumber
>>>>>> > >>>>>> instead of using an existing field is for backwards
>>>>>> compatibility. Catalogs
>>>>>> > >>>>>> can start optionally exposing the new field, and interested
>>>>>> clients can use
>>>>>> > >>>>>> the new field, but existing clients keep working as is.
>>>>>> Existing and new
>>>>>> > >>>>>> clients can also keep working as is against the same tables
>>>>>> in the
>>>>>> > >>>>>> same Catalog. My one worry is that having Catalog override
>>>>>> the timestamp
>>>>>> > >>>>>> field for commits may break some existing clients? Today all
>>>>>> Iceberg
>>>>>> > >>>>>> engines/clients do not expect the timestamp field in
>>>>>> metadata/snapshot-log
>>>>>> > >>>>>> to be overwritten by the Catalog.
>>>>>> > >>>>>>
>>>>>> > >>>>>> How do you feel about taking the best from each proposal?,
>>>>>> i.e.
>>>>>> > >>>>>> monotonically increasing commit sequence numbers (some
>>>>>> catalogs can use
>>>>>> > >>>>>> timestamps, some can use logical clock but we don't have to
>>>>>> enforce it -
>>>>>> > >>>>>> leave it up to Catalog), but keep client side logic for
>>>>>> resolving the right
>>>>>> > >>>>>> snapshot using sequence numbers instead of adding that
>>>>>> functionality to
>>>>>> > >>>>>> Catalog. Let me know!
>>>>>> > >>>>>>
>>>>>> > >>>>>> Thank you!
>>>>>> > >>>>>> -Jagdeep
>>>>>> > >>>>>>
>>>>>> > >>>>>> On Tue, May 20, 2025 at 2:45 PM Ryan Blue <[email protected]>
>>>>>> wrote:
>>>>>> > >>>>>>
>>>>>> > >>>>>>> Thanks for the proposals! There are things that I think are
>>>>>> good
>>>>>> > >>>>>>> about both of them. I think that the catalog-authored
>>>>>> timestamps proposal
>>>>>> > >>>>>>> misunderstands the purpose of the timestamp field, but does
>>>>>> get right that
>>>>>> > >>>>>>> a monotonically increasing "time" field (really a sequence
>>>>>> number) across
>>>>>> > >>>>>>> tables enables the coordination needed for snapshot
>>>>>> isolated reads. I like
>>>>>> > >>>>>>> that the sequence number proposal leaves the meaning of the
>>>>>> field to the
>>>>>> > >>>>>>> catalog for coordination, but it still proposes catalog
>>>>>> coordination by
>>>>>> > >>>>>>> loading tables "at" some sequence number. Ideally, we would
>>>>>> be able to
>>>>>> > >>>>>>> (optionally) expose this extra catalog information to
>>>>>> clients and not need
>>>>>> > >>>>>>> to change how loading works.
>>>>>> > >>>>>>>
>>>>>> > >>>>>>> Ryan
>>>>>> > >>>>>>>
>>>>>> > >>>>>>> On Tue, May 20, 2025 at 9:45 AM Ryan Blue <[email protected]>
>>>>>> wrote:
>>>>>> > >>>>>>>
>>>>>> > >>>>>>>> Hi everyone,
>>>>>> > >>>>>>>>
>>>>>> > >>>>>>>> To avoid passing copies of a file around for comments, I
>>>>>> put the
>>>>>> > >>>>>>>> doc for commit sequence numbers into Google so we can
>>>>>> comment on a central
>>>>>> > >>>>>>>> copy:
>>>>>> > >>>>>>>>
>>>>>> https://docs.google.com/document/d/1jr4Ah8oceOmo6fwxG_0II4vKDUHUKScb/edit?usp=sharing&ouid=100239850723655533404&rtpof=true&sd=true
>>>>>> > >>>>>>>>
>>>>>> > >>>>>>>> Ryan
>>>>>> > >>>>>>>>
>>>>>> > >>>>>>>> On Fri, May 16, 2025 at 2:51 AM Maninderjit Singh <
>>>>>> > >>>>>>>> [email protected]> wrote:
>>>>>> > >>>>>>>>
>>>>>> > >>>>>>>>> Thanks for the updated proposal Drew!
>>>>>> > >>>>>>>>> My preference for using the catalog authored timestamp is
>>>>>> to
>>>>>> > >>>>>>>>> minimize changes to the REST spec so we can have good
>>>>>> backwards
>>>>>> > >>>>>>>>> compatibility. I have quickly put together a draft
>>>>>> proposal on how this
>>>>>> > >>>>>>>>> should work. Looking forward to feedback and discussion.
>>>>>> > >>>>>>>>>
>>>>>> > >>>>>>>>>  Draft Proposal: Catalog‑Authored Timestamps for
>>>>>> Apache Iceberg
>>>>>> > >>>>>>>>> REST Catalog
>>>>>> > >>>>>>>>> <
>>>>>> https://drive.google.com/open?id=1KVgUJc1WgftHfLz118vMbEE7HV8_pUDk4s-GJFDyAOE
>>>>>> >
>>>>>> > >>>>>>>>>
>>>>>> > >>>>>>>>> Thanks,
>>>>>> > >>>>>>>>> Maninder
>>>>>> > >>>>>>>>>
>>>>>> > >>>>>>>>> On Wed, May 14, 2025 at 6:12 PM Drew <[email protected]>
>>>>>> wrote:
>>>>>> > >>>>>>>>>
>>>>>> > >>>>>>>>>> Hi everyone,
>>>>>> > >>>>>>>>>>
>>>>>> > >>>>>>>>>> Thank you for feedback on the MTT proposal and during
>>>>>> community
>>>>>> > >>>>>>>>>> sync. Based on it, Jagdeep and I have iterated on the
>>>>>> document and added a
>>>>>> > >>>>>>>>>> second option to use *Catalog CommitSequenceNumbers*.
>>>>>> Looking
>>>>>> > >>>>>>>>>> forward to getting more feedback on the proposal, where
>>>>>> to add more details
>>>>>> > >>>>>>>>>> or approach/changes to consider. We appreciate
>>>>>> everyone's time on this!
>>>>>> > >>>>>>>>>>
>>>>>> > >>>>>>>>>> The option introduces *Catalog
>>>>>> CommitSequenceNumbers(CSNs)*,
>>>>>> > >>>>>>>>>> which allow clients/engines to read a consistent view of
>>>>>> multiple tables
>>>>>> > >>>>>>>>>> without needing to register a transaction context with
>>>>>> the catalog. This
>>>>>> > >>>>>>>>>> removes the need of registering a transaction context
>>>>>> with Catalog, thus
>>>>>> > >>>>>>>>>> removing the need of transaction bookkeeping on the
>>>>>> catalog side. For
>>>>>> > >>>>>>>>>> aborting transactions early, clients can use LoadTable
>>>>>> with and without CSN
>>>>>> > >>>>>>>>>> to figure out if there is already a conflicting write on
>>>>>> any of the tables
>>>>>> > >>>>>>>>>> being modified. Also removed the section where
>>>>>> transactions were staging
>>>>>> > >>>>>>>>>> commits on Catalog, and changed the proposal to align
>>>>>> with Eduard's PR
>>>>>> > >>>>>>>>>> around staging changes locally before commit (
>>>>>> > >>>>>>>>>> https://github.com/apache/iceberg/pull/6948).
>>>>>> > >>>>>>>>>>
>>>>>> > >>>>>>>>>> Jagdeep also clarified in an example in a previous email
>>>>>> where a
>>>>>> > >>>>>>>>>> workload may require multi table snapshot isolation,
>>>>>> even if the tables are
>>>>>> > >>>>>>>>>> being updated without Multi-Table commit API. Though
>>>>>> most MTT transactions
>>>>>> > >>>>>>>>>> will commit using the multi table commit API.
>>>>>> > >>>>>>>>>>
>>>>>> > >>>>>>>>>> Maninder, for the approach of "common notion of time
>>>>>> between
>>>>>> > >>>>>>>>>> clients and catalog" - I spent some time thinking about
>>>>>> it, but cannot find
>>>>>> > >>>>>>>>>> a feasible way to do this. Yes, the catalogs can use a
>>>>>> high precision
>>>>>> > >>>>>>>>>> clock, but clients cannot use Catalog Timestamp from API
>>>>>> calls to set local
>>>>>> > >>>>>>>>>> clock due to network latency for request/response. For
>>>>>> example, different
>>>>>> > >>>>>>>>>> requests to the same Catalog servers can return
>>>>>> different timestamps based
>>>>>> > >>>>>>>>>> on network latency. Also what if a client works with
>>>>>> more than 1 Catalog.
>>>>>> > >>>>>>>>>> If you want to do a rough write-up or share a reference
>>>>>> implementation that
>>>>>> > >>>>>>>>>> uses such an approach, I will be happy to brainstorm it
>>>>>> more. Let us know!
>>>>>> > >>>>>>>>>>
>>>>>> > >>>>>>>>>> Here is the link to updated proposal
>>>>>> > >>>>>>>>>>
>>>>>> > >>>>>>>>>>
>>>>>> > >>>>>>>>>> <
>>>>>> https://docs.google.com/document/d/1jr4Ah8oceOmo6fwxG_0II4vKDUHUKScb/edit?usp=sharing&ouid=100384647237395649950&rtpof=true&sd=true
>>>>>> >
>>>>>> > >>>>>>>>>> Thanks Again!
>>>>>> > >>>>>>>>>> - Drew
>>>>>> > >>>>>>>>>>
>>>>>> > >>>>>>>>>
>>>>>>
>>>>>

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