## Description of `xl.meta`

`xl.meta` is a new self describing backend format used by MinIO to support AWS S3 compatible versioning.
This file is the source of truth for each `version` at rest. `xl.meta` is a msgpack file serialized from a
well defined data structure. To understand `xl.meta` here are the few things to start with

minio server --address 127.0.0.1:9001 "http://127.0.0.1:9001/tmp/multisitea/data/disterasure/xl{1...4}" \
	"http://127.0.0.1:9002/tmp/multisitea/data/disterasure/xl{5...8}" >/tmp/sitea_1.log 2>&1 &
minio server --address 127.0.0.1:9002 "http://127.0.0.1:9001/tmp/multisitea/data/disterasure/xl{1...4}" \
	"http://127.0.0.1:9002/tmp/multisitea/data/disterasure/xl{5...8}" >/tmp/sitea_2.log 2>&1 &

t}.mt-xl-2,.my-xl-2{margin-top:.5rem!important}.mr-xl-2,.mx-xl-2{margin-right:.5rem!important}.mb-xl-2,.my-xl-2{margin-bottom:.5rem!important}.ml-xl-2,.mx-xl-2{margin-left:.5rem!important}.m-xl-3{margin:1rem!important}.mt-xl-3,.my-xl-3{margin-top:1rem!important}.mr-xl-3,.mx-xl-3{margin-right:1rem!important}.mb-xl-3,.my-xl-3{margin-bottom:1rem!important}.ml-xl-3,.mx-xl-3{margin-left:1rem!important}.m-xl-4{margin:1.5rem!important}.mt-xl-4,.my-xl-4{margin-top:1.5rem!important}.mr-xl-4,.mx-xl-4{marg...

666667%}.offset-xl-3{margin-left:25%}.offset-xl-4{margin-left:33.33333333%}.offset-xl-5{margin-left:41.66666667%}.offset-xl-6{margin-left:50%}.offset-xl-7{margin-left:58.33333333%}.offset-xl-8{margin-left:66.66666667%}.offset-xl-9{margin-left:75%}.offset-xl-10{margin-left:83.33333333%}.offset-xl-11{margin-left:91.66666667%}.g-xl-0,.gx-xl-0{--bs-gutter-x:0}.g-xl-0,.gy-xl-0{--bs-gutter-y:0}.g-xl-1,.gx-xl-1{--bs-gutter-x:0.25rem}.g-xl-1,.gy-xl-1{--bs-gutter-y:0.25rem}.g-xl-2,.gx-xl-2{--bs-gutter-x:...

fi

minio server --address 127.0.0.1:9001 "http://127.0.0.1:9001/tmp/multisitea/data/disterasure/xl{1...4}" \
	"http://127.0.0.1:9002/tmp/multisitea/data/disterasure/xl{5...8}" >/tmp/sitea_1.log 2>&1 &
minio server --address 127.0.0.1:9002 "http://127.0.0.1:9001/tmp/multisitea/data/disterasure/xl{1...4}" \
	"http://127.0.0.1:9002/tmp/multisitea/data/disterasure/xl{5...8}" >/tmp/sitea_2.log 2>&1 &

policy_count=$(./mc admin policy list myminio/ | wc -l)

kill $pid

(minio server http://localhost:9000/tmp/xl/{1...10}/disk{0...1} http://localhost:9001/tmp/xl/{11...30}/disk{0...3} 2>&1 >/tmp/expanded_1.log) &
pid_1=$!

(minio server --address ":9001" http://localhost:9000/tmp/xl/{1...10}/disk{0...1} http://localhost:9001/tmp/xl/{11...30}/disk{0...3} 2>&1 >/tmp/expanded_2.log) &
pid_2=$!

sleep 30
./mc ready myminio

policy_count=$(./mc admin policy list myminio/ | wc -l)

kill $pid

(minio server http://localhost:9000/tmp/xl/{1...10}/disk{0...1} http://localhost:9001/tmp/xl/{11...30}/disk{0...3} 2>&1 >/tmp/expanded_1.log) &
pid_1=$!

(minio server --address ":9001" http://localhost:9000/tmp/xl/{1...10}/disk{0...1} http://localhost:9001/tmp/xl/{11...30}/disk{0...3} 2>&1 >/tmp/expanded_2.log) &
pid_2=$!

./mc ready myminio

	"http://127.0.0.1:9004/tmp/multisiteb/data/disterasure/xl{5...8}" >/tmp/siteb_1.log 2>&1 &
minio server --address 127.0.0.1:9004 "http://127.0.0.1:9003/tmp/multisiteb/data/disterasure/xl{1...4}" \
	"http://127.0.0.1:9004/tmp/multisiteb/data/disterasure/xl{5...8}" >/tmp/siteb_2.log 2>&1 &

minio server --address 127.0.0.1:9005 "http://127.0.0.1:9005/tmp/multisitec/data/disterasure/xl{1...4}" \

// {
//   "version": "1",
//   "format": "XXXXX",
//   "XXXXX": {
//
//   }
// }
// Here "XXXXX" depends on the backend, currently we have "fs" and "xl" implementations.
// formatMetaV1 should be inherited by backend format structs. Please look at format-fs.go
// and format-xl.go for details.

// Ideally we will never have a situation where we will have to change the
// fields of this struct and deal with related migration.

	"http://127.0.0.1:9004/tmp/multisiteb/data/disterasure/xl{5...8}" >/tmp/siteb_1.log 2>&1 &
minio server --address 127.0.0.1:9004 "http://127.0.0.1:9003/tmp/multisiteb/data/disterasure/xl{1...4}" \
	"http://127.0.0.1:9004/tmp/multisiteb/data/disterasure/xl{5...8}" >/tmp/siteb_2.log 2>&1 &

minio server --address 127.0.0.1:9005 "http://127.0.0.1:9005/tmp/multisitec/data/disterasure/xl{1...4}" \