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• Best Practices for Handing over Legacy Code

  - by PersonalNexus

  In a couple of months a colleague will be moving on to a new project and I will be inheriting one of his projects. To prepare, I have already ordered Michael Feathers' Working Effectively with Legacy Code. But this books as well as most questions on legacy code I found so far are concerned with the case of inheriting code as-is. But in this case I actually have access to the original developer and we do have some time for an orderly hand-over. Some background on the piece of code I will be inheriting: It's functioning: There are no known bugs, but as performance requirements keep going up, some optimizations will become necessary in the not too distant future. Undocumented: There is pretty much zero documentation at the method and class level. What the code is supposed to do at a higher level, though, is well-understood, because I have been writing against its API (as a black-box) for years. Only higher-level integration tests: There are only integration tests testing proper interaction with other components via the API (again, black-box). Very low-level, optimized for speed: Because this code is central to an entire system of applications, a lot of it has been optimized several times over the years and is extremely low-level (one part has its own memory manager for certain structs/records). Concurrent and lock-free: While I am very familiar with concurrent and lock-free programming and have actually contributed a few pieces to this code, this adds another layer of complexity. Large codebase: This particular project is more than ten thousand lines of code, so there is no way I will be able to have everything explained to me. Written in Delphi: I'm just going to put this out there, although I don't believe the language to be germane to the question, as I believe this type of problem to be language-agnostic. I was wondering how the time until his departure would best be spent. Here are a couple of ideas: Get everything to build on my machine: Even though everything should be checked into source code control, who hasn't forgotten to check in a file once in a while, so this should probably be the first order of business. More tests: While I would like more class-level unit tests so that when I will be making changes, any bugs I introduce can be caught early on, the code as it is now is not testable (huge classes, long methods, too many mutual dependencies). What to document: I think for starters it would be best to focus documentation on those areas in the code that would otherwise be difficult to understand e.g. because of their low-level/highly optimized nature. I am afraid there are a couple of things in there that might look ugly and in need of refactoring/rewriting, but are actually optimizations that have been out in there for a good reason that I might miss (cf. Joel Spolsky, Things You Should Never Do, Part I) How to document: I think some class diagrams of the architecture and sequence diagrams of critical functions accompanied by some prose would be best. Who to document: I was wondering what would be better, to have him write the documentation or have him explain it to me, so I can write the documentation. I am afraid, that things that are obvious to him but not me would otherwise not be covered properly. Refactoring using pair-programming: This might not be possible to do due to time constraints, but maybe I could refactor some of his code to make it more maintainable while he was still around to provide input on why things are the way they are. Please comment on and add to this. Since there isn't enough time to do all of this, I am particularly interested in how you would prioritize.

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• Part 9: EBS Customizations, how to track

  - by volker.eckardt(at)oracle.com

  In the previous blogs we were concentrating on the preparation tasks. We have defined standards, we know about the tools and techniques we will start with. Additionally, we have defined the modification strategy, and how to handle such topics best. Now we are ready to take the requirements! Such requirements coming over in spreadsheets, word files (like GAP documents), or in any other format. As we have to assign some attributes, we start numbering all that and assign a short name to each of these requirements (=CEMLI reference). We may also have already a Functional person assigned, and we might involve someone from the tech team to estimate, and we like to assign a status such as 'planned', 'estimated' etc. All these data are usually kept in spreadsheets, but I would put them into a database (yes, I am from Oracle :). If you don't have any good looking and centralized application already, please give a try with Oracle APEX. It should be up and running in a day and the imported sheets are than manageable concurrently!  For one of my clients I have created this CEMLI-DB; in between enriched with a lot of additional functionality, but initially it was just a simple centralized CEMLI tracking application. Why I am pointing out again the centralized method to manage such data? Well, your data quality will dramatically increase, if you let your project members see (also review and update) "your" data.  APEX allows you to filter, sort, print, and also export. And if you can spend some time to define proper value lists, everyone will gain from. APEX allows you to work in 'agile' mode, means you can improve your application step by step. Let's say you like to reference a document, or even upload the same, you can do that. Or, you need to classify the CEMLIs by release, just add this release field, same for business area or CEMLI type. One CEMLI record may then look like this: Prepare one or two (online) reports, to be ready to present your "workload" to the project management. Use such extracts also when you work offline (to prioritize etc.). But as soon as you are again connected, feed the data back into the central application. Note: I have combined this application with an additional issue tracker.  Here the most important element is the CEMLI reference, which acts as link to any other application (if you are not using APEX also as issue tracker :).  Please spend a minute to define such a reference (see blog Part 8: How to name Customizations).   Summary: Building the bridge from Gap analyse to the development has to be done in a controlled way. Usually the information is provided differently, but it is suggested to collect all requirements centrally. Oracle APEX is a great solution to enter and maintain such information in a structured, but flexible way. APEX helped me a lot to work with distributed development teams during the complete development cycle.

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• SQL SERVER – Identifying Column Data Type of uniqueidentifier without Querying System Tables

  - by pinaldave

  I love interesting conversations with related to SQL Server. One of my friends Madhivanan always comes up with an interesting point of conversation. Here is one of the conversation between us. I am very confident this blog post will for sure enable you with some new knowledge. Madhi: How do I know if any table has a uniqueidentifier column used in it? Pinal:  I am sure you know that you can do it through some DMV or catalogue views. Madhi: I know that but how can we do that without using DMV or catalogue views? Pinal: Hm… what can I use? Madhi: You can use table name. Pinal: Easy, just say SELECT YourUniqueIdentCol FROM Table. Madhi: Hold on, the question seems to be not clear to you – you do know the name of the column. The matter of the fact, you do not know if the table has uniqueidentifier column. Only information you have is table name. Pinal: Madhi, this seems like you are changing the question when I am close to answer. Madhi: Well, are you clear now? Let me say it again – How do I know if any table has a uniqueidentifier column and what is its value without using any DMV or System Catalogues? Only information you know is table name and you are allowed to return any kind of error if table does not have uniqueidentifier column. Pinal: Do you know the answer? Madhi: Yes. I just wanted to test your knowledge about SQL. Pinal: I will have to think. Let me accept I do not know it right away. Can you share the answer please? Madhi: I won! Here it goes! Pinal: When I have friends like you – who needs enemies? Madhi: (laughter which did not stop for a minute). CREATE TABLE t ( GuidCol UNIQUEIDENTIFIER DEFAULT newsequentialid() ROWGUIDCOL, data VARCHAR(60) ) INSERT INTO t (data) SELECT 'test' INSERT INTO t (data) SELECT 'test1' SELECT $rowguid FROM t DROP TABLE t This is indeed very interesting to me. Please note that this is not the optimal way and there will be many other ways to retrieve uniqueidentifier name and value. What I learned from this was if I am in a rush to check if the table has uniqueidentifier and I do not know the name of the same, I can use SELECT TOP (1) $rowguid and quickly know the name of the column. I can later use the same columnname in my query. Madhi did teach me this new trick. Did you know this? What are other ways to get the check uniqueidentifier column existence in a database? Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Puzzle, SQL Query, SQL Server, SQL Server Management Studio, SQL Tips and Tricks, T SQL, Technology

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• Managing software projects - advice needed

  - by Callum

  I work for a large government department as part of an IT team that manages and develops websites as well as stand alone web applications. We’re running in to problems somewhere in the SDLC that don’t rear their ugly head until time and budget are starting to run out. We try to be “Agile” (software specifications are not as thorough as possible, clients have direct access to the developers any time they want) and we are also in a reasonably peculiar position in that we are not allowed to make profit from the services we provide. We only service the divisions within our government department, and can only charge for the time and effort we actually put in to a project. So if we deliver a project that we have over-quoted on, we will only invoice for the actual time spent. Our software specifications are not as thorough as they could be, but they always include at a minimum: Wireframe mockups for every form view A data dictionary of all field inputs Descriptions of any business rules that affect the system Descriptions of the outputs I’m new to software management, but I’ve overseen enough software projects now to know that as soon as users start observing demos of the system, they start making a huge amount of requests like “Can we add a few more fields to this report.. can we redesign the look of this interface.. can we send an email at this part of the workflow.. can we take this button off this view.. can we make this function redirect to a different screen.. can we change some text on this screen… can we create a special account where someone can log in and get access to X… this report takes too long to run can it be optimised.. can we remove this step in the workflow… there’s got to be a better image we can put here…” etc etc etc. Some changes are tiny and can be implemented reasonably quickly.. but there could be up to 50-100 or so of such requests during the course of the SDLC. Other change requests are what clients claim they “just assumed would be part of the system” even if not explicitly spelled out in the spec. We are having a lot of difficulty managing this process. With no experienced software project managers in our team, we need to come up with a better way to both internally identify whether work being requested is “out of spec”, and be able to communicate this to a client in such a manner that they can understand why what they are asking for is “extra” work. We need a way to track this work and be transparent with it. In the spirit of Agile development where we are not spec'ing software systems in to the ground and back again before development begins, and bearing in mind that clients have access to any developer any time they want it, I am looking for some tips and pointers from experienced software project managers on how to handle this sort of "scope creep" problem, in tracking it, being transparent with it, and communicating it to clients such that they understand it. Happy to clarify anything as needed. I really appreciate anyone who takes the time to offer some advice. Thanks.

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• Microsoft Management Console stops working when I add snap-in to it

  - by JayaprakashReddy

  I have Windows 7 Ultimate OS. I'm opening mmc.exe as administrator and trying add Certificates or any other snap-in, then while loading that snap-in MMC breaks and displays following message and after that it closes automatically once I click on close button on that message. What could be the problem? I did following to fix the problem but couldn't succeed any of these: I tried to repair the OS I repaired files using this method Even repaired the installation using this link Update: *@oldskool: Here is the debug process output:* Sorry its a long output text. 'mmc.exe': Loaded 'C:\Windows\System32\mmc.exe', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\ntdll.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\kernel32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\KernelBase.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\gdi32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\user32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\lpk.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\usp10.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\msvcrt.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\mfc42u.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\ole32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\rpcrt4.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\oleaut32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\odbc32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\advapi32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\sechost.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\mmcbase.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\shlwapi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\uxtheme.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\duser.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\imm32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\msctf.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\odbcint.dll', Binary was not built with debug information. 'mmc.exe': Loaded 'C:\Windows\System32\dui70.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7600.16661_none_420fe3fa2b8113bd\comctl32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\shell32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\cryptbase.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\urlmon.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\wininet.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\iertutil.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\crypt32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\msasn1.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\clbcatq.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\mmcndmgr.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\dwmapi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\oleacc.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\cryptsp.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\rsaenh.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\RpcRtRemote.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\mlang.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\xmllite.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\version.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\apphelp.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\msi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin\mscormmc.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\mscoree.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\winsxs\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.4927_none_d08a205e442db5b5\msvcr80.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\azroleui.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\atl.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\secur32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\netutils.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\dsrole.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\logoncli.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\dsuiext.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\ntdsapi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\ws2_32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\nsi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\activeds.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\adsldpc.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\Wldap32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\mpr.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\netapi32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\srvcli.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\wkscli.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\certmgr.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\certcli.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\CertEnroll.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\cryptui.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\ncrypt.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\bcrypt.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\wintrust.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\imagehlp.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\sspicli.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\aclui.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\IPHLPAPI.DLL', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\winnsi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\slc.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\comsnap.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\mfc42.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\mycomput.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\devmgr.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\setupapi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\cfgmgr32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\devobj.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\devrtl.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\newdev.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\dmdskmgr.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\dmutil.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\dmdskres.dll', Binary was not built with debug information. 'mmc.exe': Loaded 'C:\Windows\System32\dmdskres2.dll', Binary was not built with debug information. 'mmc.exe': Loaded 'C:\Windows\System32\gpedit.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\dssec.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\authz.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\dfscli.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\samcli.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\gpapi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\framedynos.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\wtsapi32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\ipsmsnap.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\winipsec.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\userenv.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\profapi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\ipsecsnp.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\polstore.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\localsec.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\wdc.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\pdh.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\pdhui.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\comdlg32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\credui.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\wevtapi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\pla.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\tdh.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\winsta.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\utildll.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\browcli.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\vdmdbg.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\pmcsnap.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\winspool.drv', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\puiapi.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\wsecedit.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\scecli.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\filemgmt.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Program Files\Microsoft SQL Server\100\Tools\Binn\SqlManager.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\winsxs\x86_microsoft.vc80.mfc_1fc8b3b9a1e18e3b_8.0.50727.4053_none_cbf21254470d8752\mfc80u.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\winsxs\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.4927_none_d08a205e442db5b5\msvcp80.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\winsxs\x86_microsoft.vc80.atl_1fc8b3b9a1e18e3b_8.0.50727.4053_none_d1c738ec43578ea1\ATL80.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_5.82.7600.16661_none_ebfb56996c72aefc\comctl32.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\winsxs\x86_microsoft.vc80.mfcloc_1fc8b3b9a1e18e3b_8.0.50727.4053_none_03ca5532205cb096\mfc80ENU.dll', Binary was not built with debug information. 'mmc.exe': Loaded 'C:\Program Files\Microsoft SQL Server\100\Tools\Binn\Resources\1033\SqlManager.rll', Binary was not built with debug information. 'mmc.exe': Loaded 'C:\Windows\System32\msxml6.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Program Files\Microsoft SQL Server\90\Tools\Binn\SqlManager.dll', Cannot find or open the PDB file 'mmc.exe': Loaded 'C:\Windows\System32\wbem\wbemcntl.dll', Cannot find or open the PDB file The thread 'Win32 Thread' (0xf74) has exited with code 0 (0x0). Unhandled exception at 0x774d35e3 in mmc.exe: 0xC0000374: A heap has been corrupted.

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• iPad: what's the most popular memory size?

  - by Mark Harrison

  It comes in 16g, 32g, and 64g configurations... What's the most popular one?

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• swapping or thrashing with vast amounts of unmapped pagecache

  - by Marco

  EDIT: I noticed that this is more appropriate for superuser.com, I apologize. I don't know how to delete this question. I'm using kubuntu jaunty (i386 32bit), kernel 2.6.28-13-generic. I've 4Gb of RAM, of which only 3317Mb are seen by the system (I guess because of the 32bit system). I'm seeing that the pagecache utilization is continually growing, up to the point that the system is unusable (after a few days). This happens also when I don't do anything (all user applications closed and the bare minimum of services enabled). If enabled, the system starts to use swap space (using it all in the end). Even if swap is disabled, disk activity becomes continuous, with the system unresponsive. For example, right now the system is working (albeit a tad slow), with only firefox and wing ide running, and I have 2Gb cached with only 45Mb mapped: $ free total used free shared buffers cached Mem: 3346388 3247328 99060 0 8416 2117980 -/+ buffers/cache: 1120932 2225456 Swap: 2144668 519448 1625220 $ cat /proc/meminfo MemTotal: 3346388 kB MemFree: 97128 kB Buffers: 7872 kB Cached: 2120224 kB SwapCached: 413860 kB Active: 2304596 kB Inactive: 865984 kB Active(anon): 2279168 kB Inactive(anon): 830236 kB Active(file): 25428 kB Inactive(file): 35748 kB Unevictable: 32 kB Mlocked: 32 kB HighTotal: 2492940 kB HighFree: 5456 kB LowTotal: 853448 kB LowFree: 91672 kB SwapTotal: 2144668 kB SwapFree: 1625244 kB Dirty: 84 kB Writeback: 0 kB AnonPages: 629304 kB Mapped: 45768 kB Slab: 45600 kB SReclaimable: 21756 kB SUnreclaim: 23844 kB PageTables: 4468 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 3817860 kB Committed_AS: 3735020 kB VmallocTotal: 122880 kB VmallocUsed: 9352 kB VmallocChunk: 66600 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 4096 kB DirectMap4k: 16376 kB DirectMap4M: 888832 kB If I try to drop the caches, little happes: # sync ; echo 3 > /proc/sys/vm/drop_caches ; free total used free shared buffers cached Mem: 3346388 3220580 125808 0 3020 2100600 -/+ buffers/cache: 1116960 2229428 Swap: 2144668 519356 1625312 Right now I've vm.swappiness = 5, but I've tried also with 0 and 1 (without noticeable differences). I've also tried vm.vfs_cache_pressure = 50 and 150 (again, no differences). As I said the pagecache eats all memory even with swapping turned off. What is happening? How to avoid this? TIA, Marco

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• PAE, 60 GB of Memory, 32 bit Windows Server OS vs 64 bit OS

  - by dynback.com

  I have 60 Gb of RAM on server. Windows 2008, 32bit with PAE. One Sql Server 2008 Express Instance can use 1 Gb of RAM. So if I install 60 instances, each can use 1 Gb of RAM, right? And the second question, what will be if I install 64bit system and use many Express instances?

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• pros and cons with server management gui tools to manage linux web servers

  - by ajsie

  i have stumbled upon these GUI tools that could help you manage your linux server through a web interface. ebox, webmin, ispconfig, zivios, ispcp, plesk, cpanel etc. i wonder what the pros and cons are with these solutions. a lot of people is saying that they are not as good as using pure command line (ssh) to manage your server. but i think thats yet another "linux are for advanced users" talk. i agree that a lot of things may only be done with the command line by editing directly in the configuration files. but i don't really want to do that every time and for everything. especially basic configurations these could manage. its like not having phpmyadmin for managing mysql. it would be a pain in the ass right? so if one wants to throw up a web server serving a php site oneself developed and wants all the usual stuff up and running (mysql, phpmyadmin, svn, webdav etc) is these tools the right way to go? and for more advanced features, one just use the terminal like old days. is this a smart way of managing a linux server? and which one would you choose? have you used any of these and could share your thoughts about them?

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• Hyper V Server 2012 Remote Management Using Workgroup

  - by Chris Kolenko

  I'm trying to remotely manage Hyper V server 2012 from a windows 8 pc, both client and server are on a workgroup. I've spent about 3-4 hours trying to get this working with no luck so far trying the following: Creating a new administrator on the server with the same details as the client ie. username / password. Add an entry into my hosts file to point to the remote ip by server name. Tried using HVRemote. Disabled both firewalls. The error that I'm getting is RPC Service Unavailable. How can I accomplish what I'm trying to do? Update Some of the operations on the Hyper-V Manager work. IE. Virtual Switch Works. I can open the New VM Wizard. I run into an error when creating a new Virtual Hard Disk tho. I've tried creating a VM without a hard disk, which works. Using the new hard disk wizard does not work either. I still can not see any Virtual Machines. RPC server unavailable. Unable to establish communication between 'ServerName' and 'ClientName'

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• API Management Solutions

  - by Mike

  I'm currently building an API and am looking for a tool to allow me to monitor (in a GUI) and rate limit usage. I've come across a few enterprise solutions including: http://apigee.com/ http://mashery.com/ http://www.layer7tech.com/ http://www.3scale.net/ The Apigee enterprise plan is exactly what I'm looking for but plans start at $3000 / month which is out of my price range. The other solutions are all either to expense or do not provide the solution I'm looking for. This led me to look at some open source options including: http://apiaxle.com/ https://code.google.com/p/varnish-apikey/wiki/UsageManual Varnish seems like a fairly complete solution, however I would need to build a GUI to visualise the data. My final option would to build a solution from scratch using EventMachine and ruby. Any advice?

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• Backup a Linked MySQL DB through SQL Server Management Studio

  - by saturdayplace

  I have a MySQL database that I'm able to query as a Linked Server through SQL Server Mgt Studio. I'm wondering if it's possible to create a backup task in Studio that will backup the MySQL DB, so that I could schedule automated backups. Is this possible?

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• Printer Management in AD Domain

  - by Untalented

  Hello, I normally push out all my printers via group policy preferences. However, the new copy machines I have are using some stranger drivers and I can not install x64/x86 drivers on the same machine for my clients to pull drivers from. So now I have two machines setup with the printer so they can pull drivers. Ontop of this there is specific driver configuration settings such as requiring the user to enter an access code to print set. Once the printer is installed via GPP, it puts everything to the default such as color mode, and other custom settings we like. I considered just using a Windows Print Server for this, but I do not know a way to push/delete these from clients like I can with GPP. Does anyone know how I can have a GPP copy the custom configuration I have set in the driver or have any recommendations?

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• Generating a record of the full(-ish) package management state

  - by intuited

  I'm about to make some system changes and I'd like to have a record of my current happy system state. Is there a convenient way to create a record of this? I'd like to keep track of info like currently installed packages and their versions which packages are pinned at what version which source (as in /etc/apt/sources.list) they were installed from whether they were installed directly or automatically installed as a dependency of a different package "unknown unknowns": ie stuff that I don't know that I should be keeping track of but which may be important when trying to figure out why something doesn't work In short, I'd like to keep as much of the aptitude database as possible. What's the best way to do this? It would be nice if the resulting records were easily readable, though this is not really essential. It would be extra nice if it were readily versionable through an SCM tool like git. There is a superuser question that partially answers this, but it only provides the list of currently installed packages.

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• Generating a record of the full(-ish) package management state

  - by intuited

  I'm about to make some system changes and I'd like to have a record of my current happy system state. Is there a convenient way to create a record of this? I'd like to keep track of info like currently installed packages and their versions which packages are pinned at what version which source (as in /etc/apt/sources.list) they were installed from whether they were installed directly or automatically installed as a dependency of a different package "unknown unknowns": ie stuff that I don't know that I should be keeping track of but which may be important when trying to figure out why something doesn't work In short, I'd like to keep as much of the aptitude database as possible. What's the best way to do this? It would be nice if the resulting records were easily readable, though this is not really essential. It would be extra nice if it were readily versionable through an SCM tool like git. There is a superuser question that partially answers this, but it only provides the list of currently installed packages.

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• Sql Server Management Studio: Change Prefix or Suffix characters

  - by PhantomDrummer

  I have an instance of SSMS 2008, for which the option to edit data in a table doesn't work. If I right-click on any table in the Object Explorer and select 'Edit top 200 rows' I get an error dialog 'Invalid prefix or suffix characters. (MS Visual Database Tools)'. The error seems to be associated specifically with SSMS, not with SQL Server (because this SSMS instance gives the same error no matter what database I connect to, but I've verified I can connect to some of the same databases using SSMS on other machines without the error). (However, our firewall prevents me using SSMS on other machines for some crucial tasks, so I do need to fix the problem). Googling for the error suggests that I should change the prefix, suffix or escape character, but without any indication of how you can make that change in SSMS. I'd also note that I'm not aware of having done any customization on SSMS since installing it, so would be surprised at having to make such a change now. Does anyone have any idea what the error message means or what I can do about it? Or how I can change the prefix/suffix/escape characters if that is really the problem.

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• Windows 7 Disk Management Spanned Volume vs Striped Volume

  - by Kairan

  Im looking for a reason why a person would use a Spanned volume rather than a Striped volume? If my understanding is correct Striped: Faster read/write speed than spanned, but I "assume" more wear+tear Spanned: No speed benefit like striped, but data is written sequentially and fills up Drive1 before filling up Drive2, so it saves on wear+tear Beyond that Im not sure if there is any other deciding factor on which to use. Definition found below: A striped volume uses the free space on more than one physical hard disk to create a bigger volume. Unlike a spanned volume, a striped volume writes across all volumes in the stripe in small blocks, distributing the load across the disks in the volume. The portions of disk used to create the volume need to be the same size; the size of the smallest free space included in the striped volume will determine.

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• What is consuming so much memory?

  - by Christopher

  Hi, I am having a few problems with my server. It is throwing up intermittant errors and running quite slow. Here is the output from top: top - 07:33:33 up 18:57, 1 user, load average: 0.00, 0.00, 0.00 Tasks: 90 total, 1 running, 82 sleeping, 7 stopped, 0 zombie Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1048576k total, 1048576k used, 0k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached Ordered by %MEM: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 9597 root 16 0 276m 91m 15m S 0.0 8.9 0:29.38 java 9564 tomcat 15 0 249m 34m 11m S 0.0 3.4 0:11.79 java 9636 root 18 0 54804 24m 9784 S 0.0 2.4 0:02.58 httpd 26139 apache 15 0 57520 23m 5996 S 0.0 2.3 0:00.15 httpd 16264 apache 18 0 56984 23m 6104 S 0.0 2.2 0:00.21 httpd 24294 apache 15 0 57512 22m 5864 S 0.0 2.2 0:00.17 httpd 30231 apache 15 0 57272 22m 5748 S 0.0 2.2 0:00.97 httpd 32257 apache 15 0 57512 22m 5416 S 0.0 2.2 0:00.46 httpd 19947 apache 15 0 57512 22m 5320 S 0.0 2.2 0:00.19 httpd 26148 apache 15 0 56688 22m 5992 S 0.0 2.2 0:00.40 httpd 14039 apache 18 0 57000 22m 5492 S 0.0 2.2 0:00.33 httpd 6051 apache 15 0 57736 22m 5128 S 0.0 2.2 0:00.07 httpd 19937 apache 15 0 56992 22m 5400 S 0.0 2.2 0:00.14 httpd 5200 apache 15 0 56984 22m 5376 S 0.0 2.2 0:00.23 httpd 10001 apache 15 0 55636 21m 5636 S 0.0 2.1 0:01.05 httpd 11734 apache 15 0 56712 21m 4548 S 0.0 2.1 0:00.46 httpd 18193 apache 15 0 55100 20m 5508 S 0.0 2.0 0:00.24 httpd 14036 apache 15 0 55128 20m 5412 S 0.0 2.0 0:00.10 httpd 3981 apache 15 0 55128 19m 4860 S 0.0 1.9 0:00.16 httpd 7588 apache 18 0 55112 19m 4848 S 0.0 1.9 0:00.04 httpd 19768 apache 16 0 55112 19m 4844 S 0.0 1.9 0:00.02 httpd 5827 apache 15 0 55112 19m 4828 S 0.0 1.9 0:00.05 httpd 29774 apache 15 0 55112 19m 4544 S 0.0 1.9 0:00.11 httpd 6064 apache 15 0 55112 19m 4536 S 0.0 1.9 0:00.02 httpd 16253 apache 17 0 55116 19m 4532 S 0.0 1.9 0:00.01 httpd 19922 apache 15 0 55112 19m 4540 S 0.0 1.9 0:00.02 httpd 10010 apache 15 0 55100 19m 4524 S 0.0 1.9 0:00.01 httpd 18195 apache 18 0 55104 18m 3872 S 0.0 1.8 0:00.02 httpd 7361 mysql 15 0 134m 18m 6400 S 0.0 1.8 0:10.18 mysqld 19921 apache 15 0 55088 18m 3588 S 0.0 1.8 0:00.02 httpd 11967 apache 15 0 55080 18m 3584 S 0.0 1.8 0:00.00 httpd 13813 apache 15 0 55088 18m 3576 S 0.0 1.8 0:00.14 httpd 23898 apache 18 0 54968 17m 3212 S 0.0 1.7 0:00.00 httpd 13792 apache 15 0 54968 17m 3088 S 0.0 1.7 0:00.00 httpd 14083 apache 15 0 54968 17m 3088 S 0.0 1.7 0:00.00 httpd 32547 apache 15 0 54944 17m 2924 S 0.0 1.7 0:00.00 httpd 13787 apache 15 0 54944 17m 2908 S 0.0 1.7 0:00.00 httpd 3623 apache 17 0 54944 17m 2908 S 0.0 1.7 0:00.00 httpd 16024 apache 19 0 54944 17m 2860 S 0.0 1.7 0:00.00 httpd 13791 apache 15 0 54944 17m 2864 S 0.0 1.7 0:00.00 httpd 20090 named 19 0 110m 4244 2056 S 0.0 0.4 0:01.55 named 9369 cyrus 15 0 15904 3048 1720 S 0.0 0.3 0:00.24 cyrus-master 32735 root 15 0 8852 2888 2116 T 0.0 0.3 0:00.00 mysql The intermittant error I get using Firefox is: Server not found Firefox can't find the server at XXXXXXX.co. * Check the address for typing errors such as ww.example.com instead of www.example.com * If you are unable to load any pages, check your computer's network connection. * If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web. And on other browsers, the page just loads for about 10 minutes but never appears. The only way to resolve it is to close the browser completely as the error appears to be saved in the cache. Has anyone got any ideas? Many Thanks.

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• JVM memory initializazion error after windows update

  - by gianni

  We have three Windows Server 2003 with 2 GB RAM. Server1 tomcat 5.5.25 jvm version SUN 1.6.0_11-b03 Server2 tomcat 5.5.25 jvm version SUN 1.6.0_14-b08 Server3 tomcat 6.0.18 jvm version SUN 1.6.0_14-b08 For the three servers JVM parameters are: -XX:MaxPermSize=256m -Dcatalina.base=C:\Programmi\Apache Group\apache-tomcat-5.5.25 -Dcatalina.home=C:\Programmi\Apache Group\apache-tomcat-5.5.25 -Djava.endorsed.dirs=C:\Programmi\Apache Group\apache-tomcat-5.5.25\common\endorsed -Djava.io.tmpdir=C:\Programmi\Apache Group\apache-tomcat-5.5.25\temp vfprintf -Xms512m -Xmx1024m For some months everithing worked fine. Last friday we installed some windows updates. After the reboot tomcat doesnt start with error: Error occurred during initialization of VM Could not reserve enough space for object heap We reduced the parameter -Xmx1024m to -Xmx768m and now tomcat starts. But we need greater max heap size What happened to our servers ? Thanks in advance.

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• Local Password Management

  - by ultimazombie88

  In our office (and I am sure many others) we access various websites and tend to share one account with our team. For example, we share credentials to Ebay and change them every few weeks to maintain some sense of security. However, we know this does not allow for any type of accountability for major changes. After some discussion we want to try to manage how we distribute credentials for sites that may not offer child accounts. Is there any smart and safe way to do this? If so how do you do it?

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• Word 2007 textbox management

  - by TheSavo

  I am updating a user manual that was initially written by somebody else. I know that most manuals are not written in Word, but our office only uses Microsoft Office applications. I am doing fairly well, creating and applying "styles". A lot of the directions in this manual require updated screenshots of the program it documents. … It's a big mess. </rant> One thing I am attempting to do is add “call outs” or Note text boxes like those seen in modern software manuals. I am attempting to do this with the Text box feature. However, I am having a hard time making them uniform in size and positioning. Does Word offer a way to manage the size and other properties of textboxes, similar to the way it allows you to manage text in styles? I feel that this could (or should) be possible. Is it possible to manage Text Boxes the same way you can manage styles?

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• Linux process management

  - by tanascius

  Hello, I started a long running background-process (dd with /etc/urandom) in my ssh console. Later I had to disconnect. When I logged in, again (this time directly, without ssh), the process still seemed to to run. I am not sure what happened - I did not use disown. When I logged in later, the process was not listed in top at first, but after a while it reclaimed a high CPU percentage, as I expected. So I assume dd is still running. Now, I'd like to see the progress. I use kill -USR1 <pid> but nothing is printed. Is there any way to get the output again?

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• saslauthd using too much memory

  - by Brian Armstrong

  Woke up today to see my site slow/unresponsive. Pulled up top and it looks like a ton of saslauthd processes have spun up using about 64m of RAM each, causing the machine to enter swap space. I've never seen this many used on there. top - 16:54:13 up 85 days, 11:48, 1 user, load average: 0.32, 0.50, 0.38 Tasks: 143 total, 1 running, 142 sleeping, 0 stopped, 0 zombie Cpu(s): 0.7%us, 0.3%sy, 0.0%ni, 97.3%id, 0.2%wa, 0.0%hi, 0.0%si, 1.4%st Mem: 1048796k total, 1025904k used, 22892k free, 14032k buffers Swap: 2097144k total, 332460k used, 1764684k free, 194348k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 848 admin 20 0 263m 115m 4840 S 0 11.3 5:02.91 ruby 906 admin 20 0 265m 113m 4828 S 0 11.1 5:37.24 ruby 30484 admin 20 0 248m 91m 4256 S 6 9.0 219:02.30 delayed_job 4075 root 20 0 160m 65m 952 S 0 6.4 0:24.22 saslauthd 4080 root 20 0 162m 64m 936 S 0 6.3 0:24.48 saslauthd 4079 root 20 0 162m 64m 936 S 0 6.3 0:24.70 saslauthd 4078 root 20 0 164m 63m 936 S 0 6.2 0:24.66 saslauthd 4077 root 20 0 163m 62m 936 S 0 6.1 0:24.66 saslauthd 3718 mysql 20 0 312m 52m 3588 S 1 5.1 3499:40 mysqld 699 root 20 0 72744 7640 2164 S 0 0.7 0:00.50 ruby 15701 postfix 20 0 106m 5712 4164 S 1 0.5 0:00.50 smtpd 15702 postfix 20 0 52444 3252 2452 S 1 0.3 0:00.06 cleanup 4062 postfix 20 0 41884 3104 1788 S 0 0.3 125:26.01 qmgr 15683 root 20 0 51504 2780 2180 S 0 0.3 0:00.04 sshd 14595 postfix 20 0 52308 2548 2304 S 1 0.2 0:24.60 proxymap 15483 postfix 20 0 43380 2544 1992 S 0 0.2 0:00.38 smtp 15486 postfix 20 0 43380 2544 1992 S 0 0.2 0:00.36 smtp 15488 postfix 20 0 43380 2540 1992 S 0 0.2 0:00.38 smtp 15485 postfix 20 0 43380 2532 1984 S 0 0.2 0:00.36 smtp 15489 postfix 20 0 43380 2532 1984 S 0 0.2 0:00.40 smtp Wasn't sure what Saslauthd is, Google says it handles plantext authentication. The machine has been sending a lot of email through postfix, so this could be related. Anyone know why so many may have spun up? Are they safe to kill? Thanks!

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• DNS management for WHMCS / cPanel?

  - by RD.

  I currently have WHMCS (www.whmcs.com) that I use for the billing system for my hosting company. It integrates with cPanel and WHM. I want to be able to allow clients to: Change MX Records Change DNS info (CNAME, A Record etc) 1 can be done in cPanel. But 2 not. So my questions are: 1. Is there a program/application available that will give clients access to this? I.e. So they can change their DNS info? 2. How do other companies do it?

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• Help Email Account Management among multiple users

  - by CogitoErgoSum

  So I preface this with saying this may belong in IT Security, not too sure feel free to move. Currently we have an email account [email protected] - hosted via google apps (as is all our email). We had an incident where we had to terminate an employee. This employee however had the password for this account as we have 20-30 people utilizing it at any given point to manage customer emails etc. Thinking on this I feel there must be a better way to manage access. With Google you can associate upto 10 email accounts to another the problem is we have more like 20-30 people going. We were evaluating tools such as SalesForce and Assistly where people have their own login credentials and then the system contains the appropriate smtp information for the [email protected] email address to send emails from it rather than a users personal account. Aside from those options does anyone have any other thoughts? One suggestion floated was moving everyone to desktop clients and saving the PW info there so they could only login from their physical workstation but we may have situations where we'd like employees to work remotely. Does anyone have experience with this sort of system where ~20-30 people are responding from one email box and how to manage security and access?

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