Client Administration

A client is enormous AND you must bring its client-independent data too. Why might a homogeneous database copy beat a client copy here, and what hard constraint does it impose that a remote copy does not?

Client-specific data splits into three groups, yet a setting like the factory calendar behaves as though it were shared. What are the three groups, and what is the catch with Customizing?

Before opening a client to a test-automation team, which client property must you check specifically, and what is the risk if it is enabled in a production client?

You want a client that stays untouched by the next release upgrade so you can compare before and after. Which setting does this, which client roles may use it, and what is the catch about using that client afterward?

For a client EXPORT (client transport), which user do you log on to the source client with, and why is this different from the local-copy rule of logging on as SAP*?

A large client export keeps crashing part-way through writing its data files, with plenty of transport-directory disk free. What environmental limit is the likely culprit?

You set individual-table copy and table-exclusion options via expert settings for one specific client copy. Why can that quietly break the NEXT copy someone else runs?

A copy implicitly deletes the target's data first, so why does SAP still advise explicitly deleting an existing client before copying over it, especially on Oracle?

For extremely large tables in a client copy, what index trick speeds the run, and why does it help?

You enabled the logging flag on a table in the Dictionary but its changes still are not being recorded. What second condition is required for table logging to actually happen?

Deleting a client with SCC5 to reclaim database space, you are surprised the freed space does not come back and the run takes almost as long as a copy. Why both?

A 2013-era admin guide tells you to secure clients 000, 001, and 066. On a modern S/4HANA system, which of those three no longer exists, and why?

Two independent subsidiaries each get their own client so their financials stay separate. A consultant assumes this also isolates their custom ABAP programs and Data Dictionary changes. Why is that assumption wrong?

A remote client copy only touches its target client, but importing a transported client can knock OTHER clients on the target system offline. What crosses over that causes this?

After copying a client into a non-production system, applications still point at the source's logical system name. Which postprocessing transaction fixes this, and where must you NOT blindly run it?

Right after a client copy you resume an interrupted run and hit duplicated records and a crash. What state of the target database causes this, and how do you check for it?

A colleague wants to keep the QA client fresh by re-running a client copy from production every week. Why is a client copy the wrong tool for ongoing synchronization, and what is the right one?

For system measurement / licensing, what makes an entire SAP system count as a production system, and why can that surprise you on a sandbox box?

You want to copy only user accounts into a client but deliberately leave their roles and authorization profiles behind. SAP_UONL or SAP_USER, and what does the other one bring that you did not want?

A client copy is running away and you kill its work processes in SM50, but it keeps going. Why will that not stop it, and what is the correct way to cancel?

What are the three default clients created at installation, and what is each one's purpose?

A client copy Test Run completes with no errors. Two days later the real copy aborts mid-run with the target database out of space. What did Test Run check, and why didn't it catch this in your case?

A maintenance-level import is running and you want to monitor or intervene. Which user is the only one allowed to log on, and what mistake with that user would leave you locked out during the import?

You plan a remote client copy (SCC9) into a client whose system has a slightly different table definition than the source. What does SCC9 actually move, and what requirement will block (or silently mislead) you?

You set login/no_automatic_user_sapstar > 0 to kill SAP*'s hard-coded login. Why is that NOT sufficient on its own, and what second step actually keeps the backdoor shut?

Why is running a client copy in the foreground (dialog) a mistake for anything but a tiny client, and how do you recover a copy that stopped partway?

During a security hardening pass you find user EarlyWatch in client 066 with default password SUPPORT. Your instinct is to delete it. Why is that the wrong move, and what should you do instead?

Someone proposes using client 000 (or 001) as the production client to "save creating a new one." Beyond the obvious, what specific thing lives only in 000 that this would put at risk?

A client is assigned a role (production, test, customizing, demo, training, SAP reference). For the production role specifically, does assigning it actively prevent anything, or do you still need a separate setting to stop an accidental copy?

You create a new client with SCC4. A teammate expects to find it pre-populated and ready. What does SCC4 actually write, and who can log on to the brand-new client?

Before running a client copy into an already-configured target, a colleague assures you it will "merge" with what's there. For which profiles is that wrong, and what is the one thing a client copy NEVER brings over?

You set the production client to 'no changes allowed' to protect it. A developer still manages to push a repository/cross-client change that affects it. How was that possible?

You use SU10 to lock all users in the source client before a client copy. What is the one selection mistake that can lock YOU out, and how do you guard against it?

You need to designate a real super user to replace SAP*, and you're also planning a release upgrade. Which profile makes someone super user, and which profile must NOT be confused with it during the upgrade?

For a production client, would protection level 1 be enough, or do you need level 2 — and what extra thing does level 2 stop that level 1 does not?

You need to move a client OUT of the landscape onto external media (or keep a standalone backup of it). Why is SCC8 the right tool rather than a remote copy, and what does it write?

You try to compare Customizing between two clients with SCU0 and it refuses to access the target. Which property of that client blocks SCU0, and what compares clients otherwise?

You change a Customizing setting expecting it to affect only your client, but it changes behaviour in every other client too. What property of that table explains it, and how would you have spotted it in advance?

You're configuring parallel processing for a large client copy via an RFC server group. What's the rule-of-thumb count per database CPU, and what type of work process do those parallel RFCs consume?

A client transport import into the test client finishes. Users immediately start testing and hit inconsistent behaviour. What mandatory step was skipped, and what was the precondition for doing it right?

You need to refresh a test client with the latest application data from production but must NOT bring production user accounts across. SAP_ALL vs SAP_APPL vs SAP_CUST vs SAP_USER — which profile, and what's the trap with the obvious-looking one?

You must populate a new client from a fully configured client that lives in a DIFFERENT system. Of the three ways to populate a client, which two are even candidates, and which is the only one that does NOT need both systems online at the same time?

You're setting up the development system and need a place to do Customizing. A colleague says "just use 000, it's the master client." Why is that wrong, and what does SAP actually recommend?

After a client export you have data files RO, RT, RX (with KO/KT/KX cofiles). If you only want to verify the client-DEPENDENT data made it across, which file matters, and how is the export imported?

You need to move just the changes in one (unreleased) transport request from the customizing client to the test client in the SAME system. SCC1 or SCC5 — and what's the destructive lookalike you must not pick?

You start a local client copy with SCCL. Which client do you log on to, with which user, and what is the user-presence precondition that, if violated, corrupts the copy?

What does installing SAP*'s master record actually DO to its behaviour — strengthen its powers or weaken them — and what's the security implication if that master record gets deleted?

Beyond taking a backup, what must you do in the SOURCE client before starting a client copy so the run is not corrupted or disruptive?