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| author | Alex Auvolat <alex@adnab.me> | 2022-03-17 17:21:17 +0100 |
|---|---|---|
| committer | Alex Auvolat <alex@adnab.me> | 2022-03-17 17:21:17 +0100 |
| commit | 6c978fff810b8a1661871beabb9521fef2d929d3 (patch) | |
| tree | 22bf05b3358f64114345c03c8966d63874f9c165 | |
| parent | 0529f3c34dee78f54dbd3a384120f9b3bacb9501 (diff) | |
| download | garage-feature/improve-doc.tar.gz garage-feature/improve-doc.zip | |
Talk a bit about capacity balancing between regionsfeature/improve-doc
| -rw-r--r-- | doc/book/cookbook/real-world.md | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/doc/book/cookbook/real-world.md b/doc/book/cookbook/real-world.md index 1178ded5..ee94697c 100644 --- a/doc/book/cookbook/real-world.md +++ b/doc/book/cookbook/real-world.md @@ -23,7 +23,7 @@ To run a real-world deployment, make sure the following conditions are met: - Ideally, each machine should have a SSD available in addition to the HDD you are dedicating to Garage. This will allow for faster access to metadata and has the potential - to drastically reduce Garage's response times. + to significantly reduce Garage's response times. - This guide will assume you are using Docker containers to deploy Garage on each node. Garage can also be run independently, for instance as a [Systemd service](@/documentation/cookbook/systemd.md). @@ -35,12 +35,19 @@ For our example, we will suppose the following infrastructure with IPv6 connecti | Location | Name | IP Address | Disk Space | |----------|---------|------------|------------| -| Paris | Mercury | fc00:1::1 | 1 To | -| Paris | Venus | fc00:1::2 | 2 To | -| London | Earth | fc00:B::1 | 2 To | -| Brussels | Mars | fc00:F::1 | 1.5 To | - - +| Paris | Mercury | fc00:1::1 | 1 TB | +| Paris | Venus | fc00:1::2 | 2 TB | +| London | Earth | fc00:B::1 | 2 TB | +| Brussels | Mars | fc00:F::1 | 1.5 TB | + +Note that Garage will **always** store the three copies of your data on nodes at different +locations. This means that in the case of this small example, the available capacity +of the cluster is in fact only 1.5 TB, because nodes in Brussels can't store more than that. +This also means that nodes in Paris and London will be under-utilized. +To make better use of the available hardware, you should ensure that the capacity +available in the different locations of your cluster is roughly the same. +For instance, here, the Mercury node could be moved to Brussels; this would allow the cluster +to store 2 TB of data in total. ## Get a Docker image @@ -208,10 +215,10 @@ For our example, we will suppose we have the following infrastructure | Location | Name | Disk Space | `Capacity` | `Identifier` | `Zone` | |----------|---------|------------|------------|--------------|--------------| -| Paris | Mercury | 1 To | `10` | `563e` | `par1` | -| Paris | Venus | 2 To | `20` | `86f0` | `par1` | -| London | Earth | 2 To | `20` | `6814` | `lon1` | -| Brussels | Mars | 1.5 To | `15` | `212f` | `bru1` | +| Paris | Mercury | 1 TB | `10` | `563e` | `par1` | +| Paris | Venus | 2 TB | `20` | `86f0` | `par1` | +| London | Earth | 2 TB | `20` | `6814` | `lon1` | +| Brussels | Mars | 1.5 TB | `15` | `212f` | `bru1` | #### Node identifiers |