Users and Groups
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ow that we have created a major part of the database in the previous chapters, and before moving on to inserting and manipulating the data, this is a good point to take a moment to back up the database, just so that if things go wrong, it is possible to recover back to a stable point. What is abundantly clear when working with any sort of system where data is held is that there must be a comprehensible and workable backup and recovery strategy in place for when things go wrong. The recovery may also be required to cater to problems from a hardware failure up to an act of God. In any of these instances, we may move to an offsite location, which is a building a safe distance away from our current building housing the computing equipment. That is quite a dramatic step and is a decision that would be taken at a higher level of authority than we probably have; however, we must create a backup of our system and store it according to the recommendations of our board of directors, whether they are for in-house or offsite storage. Companies have gone bust because a good and secure backup storage wasn t in place when their building burned down, for example. This is of course a worst-case scenario, and there will be times that moving out of the current building to a second secure location is not necessary. This chapter looks at different backup strategies that can be implemented by you as a developer or an administrator, and how they would be implemented. I also show you scenarios where the database is in use 24 hours a day, 7 days a week, and how a backup strategy needs to be formed around such scenarios. From there, you will see how to perform an ad-hoc backup of the database as well as scheduled transaction log backups. It will be made clear in this chapter when you would perform both of these types of backups and when they would be useful. Of course, after the backup, you will have to test that the backup can be restored. Generally, this backup will be restored onto a nonproduction system. Some companies have complete environments established to test their disaster-recovery scenarios. What you have to realize, and what will be demonstrated, is that there are different methods of taking backups depending on what you are trying to achieve. The most common scenarios are discussed and demonstrated in this chapter, but you will also get to look at database maintenance plans. It is imperative that you get the correct backup strategy in place, and that it works. This point will be repeated throughout the chapter.
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Figure 5-2. Entourage Exchange account settings
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The implementation of UpdateCounters.cs is shown in Listing 20-3.
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Schema Extensions and Annotation-Based Transactions
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----------------------------------------------------------------------------------| Id | Operation | Name | Rows | Bytes | Cost | Pstart| Pstop | ----------------------------------------------------------------------------------| 0 | SELECT STATEMENT | | 1 | 4 | 257 | | | | 1 | SORT AGGREGATE | | 1 | 4 | | | | | 2 | PARTITION RANGE ITERATOR| | | | | 1 | 2 | |* 3 | TABLE ACCESS FULL | T1 | 102K| 398K| 257 | 1 | 2 | ----------------------------------------------------------------------------------3 - filter("T1"."PART_COL">=150 AND "T1"."PART_COL"<=250)
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Figure 10 2. Suspended service instances query 5. Order the query results on the Creation Time column by clicking the column header. You can compare the creation date with the timestamp of the error event log entry to determine if they relate to one another. Once you have found the appropriate suspended service instance in the query results list, double-click the row to launch the Service Details dialog box, as shown in Figure 10 3. The General tab of this dialog box includes high-level information regarding the suspended instance, including the BizTalk component that encountered the error, the service s status, and the instance ID. Knowing the particular component that encountered the error is a valuable and significant piece to the troubleshooting puzzle, as it assists in narrowing down where the fault occurred.
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Table 6-4. Cardinalities in Change Outside the Column Low/High
Apple s built-in FTP server supports Kerberos authentication and can be used with thirdparty software to allow for better authentication security. By default, FTP transmits the session username and password via clear text. When using the Apple FTP server with a third-party client such as, the FTP client software can negotiate a GSSAPI connection using Kerberos. This allows the client to authenticate with a Kerberos ticket rather than a password. Although this does allow for better security during the authentication exchange, it does not prevent an attacker from watching the session data. Apple s current built-in FTP server does not support transport layer security such as SSL, while the OpenSSH suite does have a more secure protocol known as SFTP, which supports both Kerberos authentication and session layer security. Unfortunately, it cannot be easily configured via the graphic interface, and as a result, users effectively are not jailed (or trapped, the good kind) within a specific directory such as their home folder or linked share points. FTP on Mac OS X Server is a highly insecure transport protocol. If it must be used, it s advisable to use SFTP or a third-party tool, such as Rumpus. NOTE: A chroot command is a technique under *nix whereby a process is permanently restricted to an isolated subset of the filesystem. Because there are insecurities within FTP and use in Mac OS X, chroot can be used to further secure FTP. One easy way to obtain this functionality without a lot of command-line configuration is to use Rumpus, a web-enabled FTP application.
We use the Java Standard Tag Library (JSTL) in our JSP pages for convenience. The JSTL tag library works the same way in a portlet application as it does in a web application. The to-do portlet will use the Standard Taglib 1.0.4 from the Jakarta Apache Taglibs project ( standard-1.0-doc/intro.html).
$mkdir ~/SecureData $ hdiutil attach -owners on -nobrowse -mountpoint ~/SecureData ~/Desktop/mySecureData.sparseimage
Writing Your Own Controls
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