NetApp Advanced Disk Partitioning — Transcript

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1. 0:00In this lecture, you'll learn about ADP,
2. 0:04advanced disk partitioning. It's an ONAP
3. 0:07feature that allows you to get more
4. 0:09usable capacity out of your discs.
5. 0:13[Music]
6. 0:20Remember at the end of the last lecture
7. 0:23I explained why you would maybe want to
8. 0:26have just one data aggregate on an
9. 0:29entry-level system. And in the example
10. 0:33we had an entry-level system with 12
11. 0:37usable discs and we had two redundant
12. 0:41controllers in there as well. So
13. 0:43controller one and controller two. Now
14. 0:45we could create two data aggregates. If
15. 0:49we did that then controller one would
16. 0:51own one. That aggregate would have six
17. 0:54discs and we would have controller 2
18. 0:56owning another aggregate also with six
19. 0:59discs. And using RAID DP out of those
20. 1:02two aggregates we would require to have
21. 1:05two par drives on each. So out of the 12
22. 1:09available discs we would have four discs
23. 1:12being used for par. Another way we could
24. 1:15do it is rather than having the two
25. 1:17aggregates, we would just have the one
26. 1:19aggregate and then we would only require
27. 1:22two parity drives rather than having
28. 1:24four and that would give us more usable
29. 1:26capacity out of the system. But that was
30. 1:30actually kind of a simplified example
31. 1:33and it's actually worse than that as
32. 1:36I'll explain here. So for this example,
33. 1:39it is a system an entry- level system
34. 1:41with 12 internal drives. So let's say
35. 1:44this is back when we had data on tap
36. 1:478.3. Actually this is before data on tap
37. 1:518.3 and before we had ADP the advanced
38. 1:54disc partitioning. Let's say we've got a
39. 1:57fast 2520 HA pair with 12 internal
40. 2:01drives. And let's look at the makeup of
41. 2:04how those drives are going to be
42. 2:06allocated. Well, it's an HA pair. So
43. 2:08we've got two controllers there. And
44. 2:10even if we only use one aggregate, one
45. 2:13data aggregate, we still need to have an
46. 2:16aggregate zero for both of our nodes,
47. 2:19the system information is stored in
48. 2:22aggregate zero. And both nodes need to
49. 2:24have access to that. Both nodes need to
50. 2:26have their own aggregate zero. So out of
51. 2:29those 12 drives, three drives would be
52. 2:32used for aggregate zero for node one.
53. 2:35Here we're using RA DP. For aggregate
54. 2:38zero, the minimum size is three discs.
55. 2:40So we do that and out of our 12 discs,
56. 2:42we've already taken out three of them
57. 2:44for aggregate zero on node one. We don't
58. 2:47just have node one, though. We also have
59. 2:49node two requiring its aggregate zero.
60. 2:51That requires another three discs. So
61. 2:54we've taken out six discs already out of
62. 2:57our 12 available. Then we also need to
63. 2:59have spare drives. We need to have two
64. 3:01spare discs. That's another two discs
65. 3:03gone. So we've taken out eight out of
66. 3:06the 12. We can now create our data
67. 3:08aggregate, but we're using RAID DP. So
68. 3:11two of the discs have to be used for
69. 3:13par. That leaves us out of our 12
70. 3:16drives, only two drives are actually
71. 3:19going to be used for user data. So two
72. 3:23discs out of 12 is we're using 17% of
73. 3:27the available capacity. So out of all
74. 3:29those discs that we bought and paid for,
75. 3:3310 of them are being used for running
76. 3:36the system and only two of them are
77. 3:38actually going to be used for what we
78. 3:40bought the system for which is storing
79. 3:41the user data. So obviously that is not
80. 3:45very efficient. So NetApp did realize
81. 3:48that was an issue. So that was why the
82. 3:51ADB feature was developed. Let's see how
83. 3:54things work when we're using ADP.
84. 3:58So with onap 8.3 the feature of root
85. 4:02data advanced disk partitioning became
86. 4:05available and what happens with ADP is
87. 4:09the discs are partitioned. So we end up
88. 4:12with as you can see in the diagram here
89. 4:14we have got a small partition that is
90. 4:16the root partition and we've got the
91. 4:18larger size partition on the right on
92. 4:21each of the discs that is the data
93. 4:23partition which is going to be used for
94. 4:25the client data. Now the way that the
95. 4:29space and the partitions is allocated is
96. 4:31we still need to do the same things but
97. 4:33rather than using an entire disk we can
98. 4:36use the smaller partition for the system
99. 4:39information.
100. 4:41So we because the partitions are smaller
101. 4:44we're going to use three of the
102. 4:46partitions for aggregate zero data for
103. 4:50node one and we still need the par
104. 4:53information as well. So two of those
105. 4:55small partitions are used for the par.
106. 4:58Then we need to do the same for node
107. 5:00two. So we use three of the small
108. 5:02partitions for its data and two of the
109. 5:05small partitions for its par. And then
110. 5:08in case we have any issues there on our
111. 5:11aggregate zeros, the last two small
112. 5:13partitions are allocated as spares.
113. 5:17Then we've still got the large partition
114. 5:19still available now. So what we do there
115. 5:22is the first one is allocated as spare.
116. 5:25Then we have two of the large partitions
117. 5:28are used for par and now all the rest of
118. 5:32those large partitions are available for
119. 5:34aggregate one for our user data. So
120. 5:38before we just had 17% usable capacity.
121. 5:42Now with ADP on exactly the same system,
122. 5:45we get up to 75% of the available
123. 5:48capacity is going to be used for our
124. 5:51user data. So that is a much more
125. 5:54efficient a much better number for the
126. 5:59users.
127. 6:00Okay. So that was root data ADP that
128. 6:03became available in onap 8.3 and onap 9.
129. 6:07Root data data ADP is now available. So
130. 6:11with root data there's the small root
131. 6:13partition and the larger data partition.
132. 6:16With root data data there's a small root
133. 6:18partition and then there's two data
134. 6:20partitions which are in an equal size
135. 6:23and we're both larger than the root
136. 6:25partition. This is supported only on all
137. 6:29flash faz. So it's not supported on the
138. 6:32faz systems here. As you just saw the
139. 6:35SSDs are partitioned into one small
140. 6:38route and two data partition. It's SSDs
141. 6:40because this is all flash faz and this
142. 6:42gets an even higher utilization again
143. 6:45which is up to 87.5%
144. 6:48of the capacity.
145. 6:51ADP is recommended on entrylevel
146. 6:55platforms because on entry-level
147. 6:57platforms you've got less disc space
148. 6:59there. So you want to make as best use
149. 7:02of the capacity as you can. on the
150. 7:05higherend systems with lots of external
151. 7:07disc shells, you've got a lot more discs
152. 7:10there. So out of the total space, the
153. 7:13actual system information is taking a
154. 7:15much smaller proportion of that. So it's
155. 7:17not a big deal. But on the entrylevel
156. 7:19platforms, if you weren't using ADP,
157. 7:22that system information would be using
158. 7:24too high a proportion of the available
159. 7:26capacity. So ADP is recommended on the
160. 7:29entry-level platforms and it's also
161. 7:31recommended on AFF all flash fast. It's
162. 7:34not supported if you're using
163. 7:36metrocluster which we'll be talking
164. 7:38about in the data protection section.
165. 7:41New systems ship with ADP already
166. 7:44configured. So it comes like that from
167. 7:46the factory. This is an an either either
168. 7:49on or off thing. So you never need to
169. 7:52configure it on new systems. Now systems
170. 7:55running older versions of ONAP. So this
171. 7:57is going back quite a ways now before
172. 8:00version 8.3 can be converted to ADP.
173. 8:04Remember in the boot process lecture you
174. 8:08saw the boot menu and one of the options
175. 8:10there was to do ADP. So you're not going
176. 8:13to have to do that now on any kind of
177. 8:15modern system. It's going to have ADP
178. 8:17configured on it already anyway. But if
179. 8:20for some reason you are working on a
180. 8:22pretty old system, you can convert it to
181. 8:25ADP. Thanks for watching. If you want to
182. 8:28get hands-on practice with Net App
183. 8:31storage for free on your laptop, then
184. 8:34you can download my free ebook, which
185. 8:36you can see above my head right now.
186. 8:39Also, check out my Net App Storage
187. 8:41complete course, which will teach you
188. 8:43everything you could possibly want to
189. 8:45know about ONTP. Thanks.