Special CMSSW_14_2 ROOT633 release for RNTuple

[smuzaffar]

@cms-sw/orp-l2 , @cms-sw/core-l2 would like to build a special CMSSW_14_2 ROOT633 release measure the properties of RNTuple. The changes needed for this have been integrated in CMSSW_14_2_ROOT6_X IBs. We propose to build CMSSW_14_2_0_pre2_50ecb2c_ROOT633 which should use

• CMSSW tag CMSSW_14_2_ROOT6_X_2024-10-16-2300 or commit 50ecb2c
• Latest IB/CMSSW_14_2_0/rootmaster cmsdist changes

If no objections then I can open the build issue to start building the release for el8_amd64_gcc12 arch only.

[smuzaffar]

assign orp

[cmsbuild]

New categories assigned: orp

@antoniovilela,@mandrenguyen,@rappoccio,@sextonkennedy you have been requested to review this Pull request/Issue and eventually sign? Thanks

[cmsbuild]

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[cmsbuild]

A new Issue was created by @smuzaffar.

@Dr15Jones, @antoniovilela, @makortel, @mandrenguyen, @rappoccio, @sextonkennedy, @smuzaffar can you please review it and eventually sign/assign? Thanks.

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[Dr15Jones]

@makortel and I double checked and the commits we need are in that version of the ROOT branch.

[smuzaffar]

@antoniovilela, @mandrenguyen let me know if I can start this build

[antoniovilela]

@antoniovilela, @mandrenguyen let me know if I can start this build

yes, sure

[smuzaffar]

thanks @antoniovilela , I have opened #46424

[Dr15Jones]

The most recent required fix in ROOT's master branch is now available

root-project/root#16712

[smuzaffar]

@Dr15Jones , root-project/root#16712 is now available in our ROOT6 IB (CMSSW_14_2_ROOT6_X_2024-10-20-2300 and above).

[Dr15Jones]

I can confirm that our version of ROOT now does have the needed fix for reading back RNTuple code. I'll do a few more tests to be confident we can make a special release.

[Dr15Jones]

@smuzaffar I have tried reading back an RNTuple file in the new release and it seems to work just fine. With that, I think we are clear to create the special release based on our most recent ROOT6 IBs.

[smuzaffar]

@Dr15Jones , as 14.2.0.pre3 is scheduled for this week, so may be we should wait few more days and then build CMSSW_14_2_0_pre3_ROOT633

[Dr15Jones]

I agree that waiting for pre3 makes sense. Thanks.

[Dr15Jones]

Even though the latest version of ROOT master didn't solve my read-back problem, I think we should go ahead with the CMSSW_14_2_0_pre3_ROOT633.

[makortel]

I guess this issue could be closed now?

[smuzaffar]

We have not built this release yet. @Dr15Jones wanted root-project/root#16810 to be part of stable release and this was only included in last night (2024-11-12-2300) IB ROOT6. As 14.2.0.pre4 is schedule for this week so I will wait for pre4 and then build a stable ROOT635 release based on pre4

[smuzaffar]

@Dr15Jones , 14.2.0.pre4 is in build phase. Should we start building 14_2_0_pre2_ROOT635 (root master is root 6.35 now) as a stable release for RNTuple studies or are we still missing something from root in our ROOT6 which should go in this special release?

[Dr15Jones]

@smuzaffar I am not aware of any very recent RNTuple that we need.

[smuzaffar]

So should we build 14_2_0_pre2_ROOT635 or ROOT6 IBs are good enough for now?

[Dr15Jones]

A 14_2_0_pre4_ROOT635 would be very helpful.

[smuzaffar]

started via #46745

[smuzaffar]

closing this issue as CMSSW_14_2_0_pre4_ROOT635 is available now