Given that Retrospect 8 is essentially a piece of crap, I’ve been searching for an alternative I can use when Time Machine is not an option for backing up Macs. The main two points I’m focused on is reliability and speed. I want a backup system I can trust that won’t take the age of the universe to recover a file.

Amanda MacDonald, Actress: On the Basis of Sex. Amanda MacDonald is an actress and writer, known for On the Basis of Sex (2018), The Truth About the Harry Quebert Affair (2018) and Ascension (2014). She has been married to Jamie Nicholls since September 6, 2014. They have two children. View the profiles of people named Amanda Macintosh on Facebook. Join Facebook to connect with Amanda Macintosh and others you may know.

I’ve been using Amanda for a while now to backup all the Macs in our workgroup (10 machines) and so far I’m nothing but happy. Amanda is an open source backup system for UNIX-based operating systems, Mac OS X included (I believe it can also backup Windows clients, but I couldn’t care less).

Descargar Borderlands v.1.2 + DLCs para PC por torrent gratis. Borderlands combines the best features of sci-fi action movie and role-play. The action takes place. Borderlands 2 dlc for mac torrent. The official website for information on the award-winning Borderlands series of shooter-looter games, add-on content, and related products. The Borderlands series have several add-on content (aka downloadable content, or DLC for short) packs available. The first two games have a 'Game of the Year Edition' that includes DLC with the base game. All DLCs are included in the Borderlands Game of the Year Edition and in the enhanced version of the Game of the Year, Borderlands GOTY Enhanced.

Amanda was originally designed to backup to tapes. Today, since hard drives became cheap and are a great media for backup, Amanda also supports virtual tapes. A virtual tape is a directory on disk that essentially acts as a tape, storing raw information. While configuring an Amanda server, you create a set of tapes of an arbitrary size (100 GB, for instance) and Amanda will use at least one tape per day, eventually rotating trough all of them.

Microsoft NTFS for Mac by Paragon Software is the best such software solution: reliable, fast, and now affordable as well Fast, seamless, and easy to use, Microsoft NTFS for Mac by Paragon Software is required for those who need to write to Windows volumes. And now it’s more affordable than ever. MacWorld, USA 2016, macworld.com. Ntfs for mac перестал.

I’ll now lay down some considerations about how Amanda works and how does that reflect on usage and backup planning. Also, I’ll do some comparisons with Time Machine.

Scheduling

In amanda, you define one or more configuration files. Each configuration can have a set of hosts (a backed-up machine), and for each host a set of disks (a disk is any directory you want to backup, it’s not needed to match Amanda disks with physical disks or logical HFS+ volumes). You generally run a backup operation that will backup all the disks of all the hosts on that configuration file.

Launching a backup operation is done by simply executing an UNIX command from whatever mechanism you prefer (cron, launchd, manually, etc). This means you can define how often does your backup run, and at what time. Usually, a daily backup is performed, but you may want to backup every 6 hours or only once per week, depending on how often does your data change and how bad is it to loose a few hours of work. This means that, in Amanda, the server is proactive and initiates the backup procedure whenever you set it to. In Time Machine, backup operations are initiated by the clients every hour. The server is simply a dumb file server where backups are stored.

Storage

Amanda uses the tar format to store data on a virtual tape. For each backed-up disk Amanda creates a tar file inside the tape with data. Amanda stores data in incremental fashion, using some redundancy as well. This is implemented trough the concept of backup levels. The base backup (where all the files on a disk are backed-up) is level 0. From there, backup levels are incremented, and each level essentially means it contains the incremental changes relative to an archive in the immediate lower level. This means a level 3 backup contains the changes relative to a level 2 backup. That level 2 backup contains the changes relative to a level 1 backup which contains, as expected, the changes relative to the level 0 backup.

Amanda decides on the level is should operate on based on a complex planner that considers several factors that result in a decision. You may add some configuration options to customize the weight of some of those factors in the final planner decision. Essentially, Amanda tries to obtain the right balance between reliability (which, in this context, means the probability of recovering a backup successfully) and used disk space. Reliability decreases as the backup level increases, due to the fact that, if you want to recover a level 5 backup, you need to have the consistent level 0, 1, 2, 3, 4 and obviously 5 backups, because each of those build upon the previous one. A level 0 backup is more reliable in the sense that you only need the level 0 backup itself to recover. Of course, a level 0 backup is an “everything” backup. If you do a level 0 backup every day, you’ll use a lot of disk space.

This is an example of a production Amanda installation for a host called bergman and volume / (the root):

Amanda Formaro Crafts

The backup level is indicated by the “lv” column. As you can see, I have 20 virtual tapes, and the last one to be used was DAILYS-5. The next one will be DAILYS-6 (its content will be erased and the tape will be reused). You may be asking yourself why are there two level 0 backups, and a lot of consecutive repeated backups with the same level.

Consider two rules of thumb to understand that:

1) A level 0 backup is needed to recover, so Amanda must make sure at least one level 0 backup exists at any time, given the number of tapes and their rotation. Also, bad stuff can happen, like a machine being down or unavailable at the time the backup runs. If that happens during a few Amanda runs, it may happen than you hit a number of rotations where you effectively loose the level 0 backup without creating a new one. That’s why Amanda makes a few level 0 backups among the way, to make sure you still have a second level 0 backup if the first one is destroyed. You can configure the maximum number of runs that go by without a level 0 backup being created. It’s highly recommended that that number is lower than the half of the total amount of tapes you have, so that, in the worst case (like in my example, where I have 20 tapes), you have a level 0 backup in the “middle” of your tape recycling circuit. Now, why did Amanda created two level 0 backups, one in July 5, and another one in July 12, effectively less than the maximum time allowed? See below.

2) Despite what seems intuitive, Amanda does not increase the backup level every run until it gets back to zero again. I don’t know in detail all the data the planner uses to make a decision, but there are at least two interesting considerations the planner takes into account.

The first one, is a level N+1 backup a lot smaller than a level N? If the answer is no, Amanda decides to keep the same level. There’s no point in increasing the level (and lowering reliability) if no significative amount of disk space will be saved. This may happen if you change approximately the same set of files in each run. In that case, the incremental backup from level N to N+1 would be of almost the same size as the N-1 to N.

Second, Amanda sometimes promotes level 0 backups ahead of schedule to spread them trough time. Doing all the level 0 backups in the same day would be very slow and might not fit in the maximum number of tapes allowed for a single run (you can define that value on the config file). There’s also another factor: free space on the tape. Remember that, for now, Amanda cannot use the same tape in two consecutive runs, so there’s no point in leaving unused space on a tape. If there’s enough space to perform a level 0 backup instead of a higher level, Amanda may decide to do it.

As you can see by now, data storage is handled quite differently in Amanda and Time Machine. I’ll assume you know how Time Machine works, so I’ll get straight to the point: in Amanda you may have more than one copy of the entire volumes you are backing up (ie, several level 0 backups of the same data), so you need to take that in consideration while planning storage space. On the other hand, amanda allows gzip compression (and encryption) of

Amanda For Mac