Disco de instalación de SQL Asesoramiento - TempDB, Log DB, cuestión ubicación de archivos de datos
https://dba.stackexchange.com/questions/5485
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16-10-2019 - |
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Tenemos un servidor de base muy activo con una colección ecléctica de aplicaciones que se ejecutan en él. Dos de los más activos son una base de datos de Laserfiche hace que el escaneo de documentos y flujo de trabajo de procesamiento durante todo el día (promedio de alrededor de 2800 solicitudes de lotes / segundo) y una aplicación de servidor de la zarzamora que enruta mensajes de correo electrónico. También existen otras 25 bases de datos de aplicaciones pequeñas.
Somos una agencia de gobierno por lo que sólo nos dieron el presupuesto para un servidor de licencias único DB.
Recientemente nos dieron una SAN a problemas de contención de disco de direcciones.
Así que actualmente tenemos la TempDB se ejecuta en su propio disco (RAID 1 par de espejos), y hemos pasado los registros de transacciones y archivos de datos en la red SAN. Los registros de transacciones se pusieron en una ubicación lógica y los archivos de datos en otro. Físicamente es la misma matriz pero es una matriz compuesta de 14 husillos totales (discos) en una configuración RAID 1 + 0.
A bastante fornido SAN - y las cosas están funcionando mucho mejor. Queue longitudes de corte por la mitad.
Hoy mismo nos da también otra opción. También podríamos tener un conjunto de 4 disco si lo necesitábamos actualmente en el servidor de archivos. Sé que tener MDF y LDF en dos matrices independientes en general, se recomienda pero la única manera de hacerlo en nuestra situación sería mover datos o registros de transacciones fuera de la SAN en la matriz 4 disco configurado como RAID 5. Tenga en cuenta que son Actualmente en los volúmenes lógicos separados pero compartiendo la misma matriz física.
disparo desde la cadera me siento como tener los MDF y LDFs juntos en un 14 RAID husillo 1 + 0 matriz es probablemente tan bueno como tener separados con una en un 5 array 4 incursión husillo. Pero, yo no estaría aquí preguntando si yo era un experto en la lógica de disco. Ambas opciones están utilizando 15k básicamente idéntico discos SAS -. Es decir, cada husillo es básicamente indentical
Así que, en esencia, la pregunta es. Es tener MDF / LDF en un solo 14 array husillo configurado como RAID 1 + 0 va a ser mejorado por cualquier margen significativo (o en absoluto) moviendo ya sea de datos o registro para su propio 4 husillo matriz RAID 5?
Los pensamientos?
nuevas informaciones:
También observará que la longitud media de la cola en la actualidad las estancias volumen de registro bastante consistentemente alrededor de 0,55. La longitud media de la cola en el volumen de datos es raramente más de 0,01 (por lo general 0,00)
RESULTADO sys.dm_io_virtual_file_stats CONSULTA:
<table>
<tr>
<td>database
id</td>
<td>Volume</td>
<td>io_stall_read_ms</td>
<td>num_of_reads</td>
<td>avg_read_stall_ms</td>
<td>io_stall_write_ms</td>
<td>num_of_writes</td>
<td>avg_write_stall_ms</td>
<td>io_stalls</td>
<td>total_io</td>
<td>avg_io_stall_ms</td>
</tr>
<tr>
<td>25</td>
<td>h</td>
<td>175086</td>
<td>1411</td>
<td>124</td>
<td>69</td>
<td>41</td>
<td>1.6</td>
<td>175155</td>
<td>1452</td>
<td>120.5</td>
</tr>
<tr>
<td>16</td>
<td>h</td>
<td>54691</td>
<td>748</td>
<td>73</td>
<td>34</td>
<td>23</td>
<td>1.4</td>
<td>54725</td>
<td>771</td>
<td>70.9</td>
</tr>
<tr>
<td>41</td>
<td>h</td>
<td>192255</td>
<td>982</td>
<td>195.6</td>
<td>5232</td>
<td>2142</td>
<td>2.4</td>
<td>197487</td>
<td>3124</td>
<td>63.2</td>
</tr>
<tr>
<td>24</td>
<td>h</td>
<td>8616</td>
<td>178</td>
<td>48.1</td>
<td>55</td>
<td>22</td>
<td>2.4</td>
<td>8671</td>
<td>200</td>
<td>43.1</td>
</tr>
<tr>
<td>29</td>
<td>h</td>
<td>54617</td>
<td>1247</td>
<td>43.8</td>
<td>71</td>
<td>41</td>
<td>1.7</td>
<td>54688</td>
<td>1288</td>
<td>42.4</td>
</tr>
<tr>
<td>40</td>
<td>h</td>
<td>132664</td>
<td>3158</td>
<td>42</td>
<td>184</td>
<td>85</td>
<td>2.1</td>
<td>132848</td>
<td>3243</td>
<td>41</td>
</tr>
<tr>
<td>15</td>
<td>h</td>
<td>26556</td>
<td>763</td>
<td>34.8</td>
<td>33</td>
<td>23</td>
<td>1.4</td>
<td>26589</td>
<td>786</td>
<td>33.8</td>
</tr>
<tr>
<td>37</td>
<td>h</td>
<td>6943152</td>
<td>500214</td>
<td>13.9</td>
<td>310706380</td>
<td>9083273</td>
<td>34.2</td>
<td>317649532</td>
<td>9583487</td>
<td>33.1</td>
</tr>
<tr>
<td>32</td>
<td>h</td>
<td>14832</td>
<td>426</td>
<td>34.7</td>
<td>42</td>
<td>38</td>
<td>1.1</td>
<td>14874</td>
<td>464</td>
<td>32</td>
</tr>
<tr>
<td>43</td>
<td>h</td>
<td>46937</td>
<td>947</td>
<td>49.5</td>
<td>1203</td>
<td>844</td>
<td>1.4</td>
<td>48140</td>
<td>1791</td>
<td>26.9</td>
</tr>
<tr>
<td>17</td>
<td>h</td>
<td>23166</td>
<td>786</td>
<td>29.4</td>
<td>260</td>
<td>125</td>
<td>2.1</td>
<td>23426</td>
<td>911</td>
<td>25.7</td>
</tr>
<tr>
<td>44</td>
<td>h</td>
<td>65563</td>
<td>2968</td>
<td>22.1</td>
<td>451</td>
<td>334</td>
<td>1.3</td>
<td>66014</td>
<td>3302</td>
<td>20</td>
</tr>
<tr>
<td>27</td>
<td>h</td>
<td>73622</td>
<td>3325</td>
<td>22.1</td>
<td>547</td>
<td>483</td>
<td>1.1</td>
<td>74169</td>
<td>3808</td>
<td>19.5</td>
</tr>
<tr>
<td>31</td>
<td>h</td>
<td>19557</td>
<td>978</td>
<td>20</td>
<td>218</td>
<td>128</td>
<td>1.7</td>
<td>19775</td>
<td>1106</td>
<td>17.9</td>
</tr>
<tr>
<td>13</td>
<td>h</td>
<td>5238308</td>
<td>176396</td>
<td>29.7</td>
<td>70537264</td>
<td>4109175</td>
<td>17.2</td>
<td>75775572</td>
<td>4285571</td>
<td>17.7</td>
</tr>
<tr>
<td>26</td>
<td>h</td>
<td>849303</td>
<td>57475</td>
<td>14.8</td>
<td>496337</td>
<td>19098</td>
<td>26</td>
<td>1345640</td>
<td>76573</td>
<td>17.6</td>
</tr>
<tr>
<td>28</td>
<td>h</td>
<td>12707</td>
<td>799</td>
<td>15.9</td>
<td>103</td>
<td>62</td>
<td>1.6</td>
<td>12810</td>
<td>861</td>
<td>14.9</td>
</tr>
<tr>
<td>42</td>
<td>h</td>
<td>28630</td>
<td>1233</td>
<td>23.2</td>
<td>1139</td>
<td>883</td>
<td>1.3</td>
<td>29769</td>
<td>2116</td>
<td>14.1</td>
</tr>
<tr>
<td>14</td>
<td>h</td>
<td>91425</td>
<td>5480</td>
<td>16.7</td>
<td>3762</td>
<td>2470</td>
<td>1.5</td>
<td>95187</td>
<td>7950</td>
<td>12</td>
</tr>
<tr>
<td>35</td>
<td>h</td>
<td>8253</td>
<td>546</td>
<td>15.1</td>
<td>193</td>
<td>174</td>
<td>1.1</td>
<td>8446</td>
<td>720</td>
<td>11.7</td>
</tr>
<tr>
<td>12</td>
<td>h</td>
<td>33008</td>
<td>1852</td>
<td>17.8</td>
<td>2179</td>
<td>1335</td>
<td>1.6</td>
<td>35187</td>
<td>3187</td>
<td>11</td>
</tr>
<tr>
<td>36</td>
<td>h</td>
<td>4322</td>
<td>470</td>
<td>9.2</td>
<td>150</td>
<td>119</td>
<td>1.3</td>
<td>4472</td>
<td>589</td>
<td>7.6</td>
</tr>
<tr>
<td>6</td>
<td>h</td>
<td>537</td>
<td>61</td>
<td>8.7</td>
<td>21</td>
<td>22</td>
<td>0.9</td>
<td>558</td>
<td>83</td>
<td>6.6</td>
</tr>
<tr>
<td>33</td>
<td>h</td>
<td>4172</td>
<td>585</td>
<td>7.1</td>
<td>63</td>
<td>59</td>
<td>1.1</td>
<td>4235</td>
<td>644</td>
<td>6.6</td>
</tr>
<tr>
<td>30</td>
<td>h</td>
<td>633</td>
<td>71</td>
<td>8.8</td>
<td>57</td>
<td>38</td>
<td>1.5</td>
<td>690</td>
<td>109</td>
<td>6.3</td>
</tr>
<tr>
<td>10</td>
<td>h</td>
<td>479</td>
<td>65</td>
<td>7.3</td>
<td>63</td>
<td>22</td>
<td>2.7</td>
<td>542</td>
<td>87</td>
<td>6.2</td>
</tr>
<tr>
<td>38</td>
<td>h</td>
<td>635</td>
<td>70</td>
<td>8.9</td>
<td>54</td>
<td>40</td>
<td>1.3</td>
<td>689</td>
<td>110</td>
<td>6.2</td>
</tr>
<tr>
<td>19</td>
<td>h</td>
<td>867</td>
<td>125</td>
<td>6.9</td>
<td>133</td>
<td>40</td>
<td>3.2</td>
<td>1000</td>
<td>165</td>
<td>6</td>
</tr>
<tr>
<td>20</td>
<td>h</td>
<td>2157</td>
<td>342</td>
<td>6.3</td>
<td>107</td>
<td>37</td>
<td>2.8</td>
<td>2264</td>
<td>379</td>
<td>6</td>
</tr>
<tr>
<td>18</td>
<td>h</td>
<td>655</td>
<td>84</td>
<td>7.7</td>
<td>109</td>
<td>44</td>
<td>2.4</td>
<td>764</td>
<td>128</td>
<td>5.9</td>
</tr>
<tr>
<td>9</td>
<td>h</td>
<td>22017</td>
<td>1269</td>
<td>17.3</td>
<td>12187</td>
<td>4510</td>
<td>2.7</td>
<td>34204</td>
<td>5779</td>
<td>5.9</td>
</tr>
<tr>
<td>11</td>
<td>h</td>
<td>1641</td>
<td>226</td>
<td>7.2</td>
<td>158</td>
<td>94</td>
<td>1.7</td>
<td>1799</td>
<td>320</td>
<td>5.6</td>
</tr>
<tr>
<td>7</td>
<td>h</td>
<td>556</td>
<td>66</td>
<td>8.3</td>
<td>40</td>
<td>40</td>
<td>1</td>
<td>596</td>
<td>106</td>
<td>5.6</td>
</tr>
<tr>
<td>20</td>
<td>t</td>
<td>639</td>
<td>90</td>
<td>7</td>
<td>118</td>
<td>43</td>
<td>2.7</td>
<td>757</td>
<td>133</td>
<td>5.6</td>
</tr>
<tr>
<td>24</td>
<td>t</td>
<td>1031</td>
<td>167</td>
<td>6.1</td>
<td>67</td>
<td>29</td>
<td>2.2</td>
<td>1098</td>
<td>196</td>
<td>5.6</td>
</tr>
<tr>
<td>25</td>
<td>t</td>
<td>1269</td>
<td>210</td>
<td>6</td>
<td>111</td>
<td>47</td>
<td>2.3</td>
<td>1380</td>
<td>257</td>
<td>5.3</td>
</tr>
<tr>
<td>29</td>
<td>t</td>
<td>680</td>
<td>94</td>
<td>7.2</td>
<td>113</td>
<td>54</td>
<td>2.1</td>
<td>793</td>
<td>148</td>
<td>5.3</td>
</tr>
<tr>
<td>30</td>
<td>t</td>
<td>233</td>
<td>25</td>
<td>9</td>
<td>145</td>
<td>47</td>
<td>3</td>
<td>378</td>
<td>72</td>
<td>5.2</td>
</tr>
<tr>
<td>13</td>
<td>t</td>
<td>11947937</td>
<td>55092</td>
<td>216.9</td>
<td>163346886</td>
<td>33789532</td>
<td>4.8</td>
<td>175294823</td>
<td>33844624</td>
<td>5.2</td>
</tr>
<tr>
<td>15</td>
<td>t</td>
<td>693</td>
<td>119</td>
<td>5.8</td>
<td>82</td>
<td>29</td>
<td>2.7</td>
<td>775</td>
<td>148</td>
<td>5.2</td>
</tr>
<tr>
<td>16</td>
<td>t</td>
<td>731</td>
<td>119</td>
<td>6.1</td>
<td>48</td>
<td>29</td>
<td>1.6</td>
<td>779</td>
<td>148</td>
<td>5.2</td>
</tr>
<tr>
<td>29</td>
<td>h</td>
<td>176</td>
<td>34</td>
<td>5</td>
<td>1</td>
<td>1</td>
<td>0.5</td>
<td>177</td>
<td>35</td>
<td>4.9</td>
</tr>
<tr>
<td>18</td>
<td>t</td>
<td>305</td>
<td>44</td>
<td>6.8</td>
<td>165</td>
<td>52</td>
<td>3.1</td>
<td>470</td>
<td>96</td>
<td>4.8</td>
</tr>
<tr>
<td>5</td>
<td>h</td>
<td>500</td>
<td>75</td>
<td>6.6</td>
<td>60</td>
<td>40</td>
<td>1.5</td>
<td>560</td>
<td>115</td>
<td>4.8</td>
</tr>
<tr>
<td>8</td>
<td>t</td>
<td>462</td>
<td>74</td>
<td>6.2</td>
<td>118</td>
<td>48</td>
<td>2.4</td>
<td>580</td>
<td>122</td>
<td>4.7</td>
</tr>
<tr>
<td>5</td>
<td>t</td>
<td>294</td>
<td>33</td>
<td>8.6</td>
<td>80</td>
<td>47</td>
<td>1.7</td>
<td>374</td>
<td>80</td>
<td>4.6</td>
</tr>
<tr>
<td>3</td>
<td>h</td>
<td>520</td>
<td>109</td>
<td>4.7</td>
<td>3</td>
<td>4</td>
<td>0.6</td>
<td>523</td>
<td>113</td>
<td>4.6</td>
</tr>
<tr>
<td>39</td>
<td>h</td>
<td>394</td>
<td>62</td>
<td>6.3</td>
<td>77</td>
<td>40</td>
<td>1.9</td>
<td>471</td>
<td>102</td>
<td>4.6</td>
</tr>
<tr>
<td>39</td>
<td>t</td>
<td>124</td>
<td>16</td>
<td>7.3</td>
<td>165</td>
<td>47</td>
<td>3.4</td>
<td>289</td>
<td>63</td>
<td>4.5</td>
</tr>
<tr>
<td>8</td>
<td>h</td>
<td>459</td>
<td>78</td>
<td>5.8</td>
<td>93</td>
<td>43</td>
<td>2.1</td>
<td>552</td>
<td>121</td>
<td>4.5</td>
</tr>
<tr>
<td>41</td>
<td>t</td>
<td>8295</td>
<td>470</td>
<td>17.6</td>
<td>4035</td>
<td>2359</td>
<td>1.7</td>
<td>12330</td>
<td>2829</td>
<td>4.4</td>
</tr>
<tr>
<td>31</td>
<td>t</td>
<td>637</td>
<td>91</td>
<td>6.9</td>
<td>170</td>
<td>95</td>
<td>1.8</td>
<td>807</td>
<td>186</td>
<td>4.3</td>
</tr>
<tr>
<td>7</td>
<td>t</td>
<td>242</td>
<td>29</td>
<td>8.1</td>
<td>80</td>
<td>47</td>
<td>1.7</td>
<td>322</td>
<td>76</td>
<td>4.2</td>
</tr>
<tr>
<td>22</td>
<td>h</td>
<td>298</td>
<td>80</td>
<td>3.7</td>
<td>0</td>
<td>1</td>
<td>0</td>
<td>298</td>
<td>81</td>
<td>3.6</td>
</tr>
<tr>
<td>38</td>
<td>t</td>
<td>139</td>
<td>22</td>
<td>6</td>
<td>115</td>
<td>47</td>
<td>2.4</td>
<td>254</td>
<td>69</td>
<td>3.6</td>
</tr>
<tr>
<td>40</td>
<td>t</td>
<td>1016</td>
<td>159</td>
<td>6.4</td>
<td>388</td>
<td>236</td>
<td>1.6</td>
<td>1404</td>
<td>395</td>
<td>3.5</td>
</tr>
<tr>
<td>22</td>
<td>t</td>
<td>76</td>
<td>18</td>
<td>4</td>
<td>7</td>
<td>5</td>
<td>1.2</td>
<td>83</td>
<td>23</td>
<td>3.5</td>
</tr>
<tr>
<td>44</td>
<td>t</td>
<td>873</td>
<td>133</td>
<td>6.5</td>
<td>479</td>
<td>263</td>
<td>1.8</td>
<td>1352</td>
<td>396</td>
<td>3.4</td>
</tr>
<tr>
<td>4</td>
<td>h</td>
<td>10565</td>
<td>2057</td>
<td>5.1</td>
<td>2840</td>
<td>2061</td>
<td>1.4</td>
<td>13405</td>
<td>4118</td>
<td>3.3</td>
</tr>
<tr>
<td>32</td>
<td>t</td>
<td>94</td>
<td>18</td>
<td>4.9</td>
<td>72</td>
<td>33</td>
<td>2.1</td>
<td>166</td>
<td>51</td>
<td>3.2</td>
</tr>
<tr>
<td>19</td>
<td>t</td>
<td>116</td>
<td>16</td>
<td>6.8</td>
<td>116</td>
<td>60</td>
<td>1.9</td>
<td>232</td>
<td>76</td>
<td>3</td>
</tr>
<tr>
<td>11</td>
<td>t</td>
<td>144</td>
<td>18</td>
<td>7.6</td>
<td>181</td>
<td>91</td>
<td>2</td>
<td>325</td>
<td>109</td>
<td>3</td>
</tr>
<tr>
<td>10</td>
<td>t</td>
<td>69</td>
<td>12</td>
<td>5.3</td>
<td>48</td>
<td>29</td>
<td>1.6</td>
<td>117</td>
<td>41</td>
<td>2.8</td>
</tr>
<tr>
<td>6</td>
<td>t</td>
<td>69</td>
<td>11</td>
<td>5.8</td>
<td>40</td>
<td>29</td>
<td>1.3</td>
<td>109</td>
<td>40</td>
<td>2.7</td>
</tr>
<tr>
<td>1</td>
<td>h</td>
<td>941</td>
<td>181</td>
<td>5.2</td>
<td>368</td>
<td>356</td>
<td>1</td>
<td>1309</td>
<td>537</td>
<td>2.4</td>
</tr>
<tr>
<td>9</td>
<td>t</td>
<td>5034</td>
<td>394</td>
<td>12.7</td>
<td>9584</td>
<td>5599</td>
<td>1.7</td>
<td>14618</td>
<td>5993</td>
<td>2.4</td>
</tr>
<tr>
<td>17</td>
<td>t</td>
<td>1335</td>
<td>213</td>
<td>6.2</td>
<td>1293</td>
<td>1119</td>
<td>1.2</td>
<td>2628</td>
<td>1332</td>
<td>2</td>
</tr>
<tr>
<td>3</td>
<td>h</td>
<td>21</td>
<td>6</td>
<td>3</td>
<td>15</td>
<td>13</td>
<td>1.1</td>
<td>36</td>
<td>19</td>
<td>1.8</td>
</tr>
<tr>
<td>34</td>
<td>h</td>
<td>1140</td>
<td>132</td>
<td>8.6</td>
<td>4146</td>
<td>2921</td>
<td>1.4</td>
<td>5286</td>
<td>3053</td>
<td>1.7</td>
</tr>
<tr>
<td>14</td>
<td>t</td>
<td>714</td>
<td>111</td>
<td>6.4</td>
<td>10175</td>
<td>6589</td>
<td>1.5</td>
<td>10889</td>
<td>6700</td>
<td>1.6</td>
</tr>
<tr>
<td>42</td>
<td>t</td>
<td>949</td>
<td>139</td>
<td>6.8</td>
<td>3420</td>
<td>2671</td>
<td>1.3</td>
<td>4369</td>
<td>2810</td>
<td>1.6</td>
</tr>
<tr>
<td>37</td>
<td>t</td>
<td>4006</td>
<td>489</td>
<td>8.2</td>
<td>15548682</td>
<td>9892846</td>
<td>1.6</td>
<td>15552688</td>
<td>9893335</td>
<td>1.6</td>
</tr>
<tr>
<td>2</td>
<td>f</td>
<td>164348</td>
<td>106669</td>
<td>1.5</td>
<td>178498</td>
<td>121970</td>
<td>1.5</td>
<td>342846</td>
<td>228639</td>
<td>1.5</td>
</tr>
<tr>
<td>28</td>
<td>t</td>
<td>1305</td>
<td>194</td>
<td>6.7</td>
<td>7006</td>
<td>5797</td>
<td>1.2</td>
<td>8311</td>
<td>5991</td>
<td>1.4</td>
</tr>
<tr>
<td>45</td>
<td>h</td>
<td>123</td>
<td>93</td>
<td>1.3</td>
<td>510</td>
<td>373</td>
<td>1.4</td>
<td>633</td>
<td>466</td>
<td>1.4</td>
</tr>
<tr>
<td>43</td>
<td>t</td>
<td>1243</td>
<td>130</td>
<td>9.5</td>
<td>13330</td>
<td>10836</td>
<td>1.2</td>
<td>14573</td>
<td>10966</td>
<td>1.3</td>
</tr>
<tr>
<td>35</td>
<td>t</td>
<td>329</td>
<td>47</td>
<td>6.9</td>
<td>25471</td>
<td>19582</td>
<td>1.3</td>
<td>25800</td>
<td>19629</td>
<td>1.3</td>
</tr>
<tr>
<td>27</td>
<td>t</td>
<td>1866</td>
<td>294</td>
<td>6.3</td>
<td>12196</td>
<td>10243</td>
<td>1.2</td>
<td>14062</td>
<td>10537</td>
<td>1.3</td>
</tr>
<tr>
<td>12</td>
<td>t</td>
<td>13789</td>
<td>2852</td>
<td>4.8</td>
<td>28818</td>
<td>29040</td>
<td>1</td>
<td>42607</td>
<td>31892</td>
<td>1.3</td>
</tr>
<tr>
<td>4</td>
<td>t</td>
<td>511</td>
<td>67</td>
<td>7.5</td>
<td>158330</td>
<td>130742</td>
<td>1.2</td>
<td>158841</td>
<td>130809</td>
<td>1.2</td>
</tr>
<tr>
<td>34</td>
<td>t</td>
<td>99</td>
<td>13</td>
<td>7.1</td>
<td>134764</td>
<td>112984</td>
<td>1.2</td>
<td>134863</td>
<td>112997</td>
<td>1.2</td>
</tr>
<tr>
<td>2</td>
<td>f</td>
<td>23</td>
<td>147</td>
<td>0.2</td>
<td>17980</td>
<td>16879</td>
<td>1.1</td>
<td>18003</td>
<td>17026</td>
<td>1.1</td>
</tr>
<tr>
<td>1</td>
<td>h</td>
<td>54</td>
<td>10</td>
<td>4.9</td>
<td>1845</td>
<td>1761</td>
<td>1</td>
<td>1899</td>
<td>1771</td>
<td>1.1</td>
</tr>
<tr>
<td>33</td>
<td>t</td>
<td>220</td>
<td>33</td>
<td>6.5</td>
<td>746</td>
<td>980</td>
<td>0.8</td>
<td>966</td>
<td>1013</td>
<td>1</td>
</tr>
<tr>
<td>36</td>
<td>t</td>
<td>199</td>
<td>27</td>
<td>7.1</td>
<td>26330</td>
<td>25429</td>
<td>1</td>
<td>26529</td>
<td>25456</td>
<td>1</td>
</tr>
<tr>
<td>45</td>
<td>t</td>
<td>5</td>
<td>8</td>
<td>0.6</td>
<td>6306</td>
<td>6142</td>
<td>1</td>
<td>6311</td>
<td>6150</td>
<td>1</td>
</tr>
<tr>
<td>26</td>
<td>t</td>
<td>2969</td>
<td>348</td>
<td>8.5</td>
<td>64557</td>
<td>70819</td>
<td>0.9</td>
<td>67526</td>
<td>71167</td>
<td>0.9</td>
</tr>
</table>
Solución
Unfortunately this is a big ol' "it depends". Complicated further by your having so many applications, probably with wildly different IO profiles, sharing the same instance/server and arrays.
Usually you would want to isolate data and log files as the IO profiles are polar opposite. Typically weighted toward random read for data files and sequential write for logs. The log element is somewhat different in your case as you have multiple log files.
I'd start by getting an understanding of the IO the databases are consuming relative to each other.
SELECT
DB_NAME(fs.database_id) AS [Database Name]
, mf.physical_name
, io_stall_read_ms
, num_of_reads
, CAST(io_stall_read_ms / (1.0 + num_of_reads) AS NUMERIC(10, 1)) AS [avg_read_stall_ms]
, io_stall_write_ms
, num_of_writes
, CAST(io_stall_write_ms / (1.0 + num_of_writes) AS NUMERIC(10, 1)) AS [avg_write_stall_ms]
, io_stall_read_ms + io_stall_write_ms AS [io_stalls]
, num_of_reads + num_of_writes AS [total_io]
, CAST((io_stall_read_ms + io_stall_write_ms)
/ (1.0 + num_of_reads + num_of_writes) AS NUMERIC(10,1)) AS [avg_io_stall_ms]
FROM
sys.dm_io_virtual_file_stats(NULL, NULL) AS fs
INNER JOIN sys.master_files AS mf
ON fs.database_id = mf.database_id
AND fs.[file_id] = mf.[file_id]
ORDER BY
DatabaseName ASC, mf.physical_name
-- num_of_reads DESC
-- num_of_writes DESC
OPTION (RECOMPILE) ;
If you can format the output of this into a readable form and add to your question, someone can make a more educated guess at the best use of your 18 disks.
If I was doing this blind, I'd probably start off allocating:
- 6 RAID10 for the busiest database's data files
- 6 RAID10 for the other database's data files
- 4 RAID10 shared Logs
- 2 RAID1 Tempdb (your single disk configuration is a risky single point of failure)
Assuming that:
- the SAN hosts other arrays and therefore hot spares are available from a pool
- snapshot isolation isn't in use or isn't placing heavy demands on tempdb
Edit: Following update to question regarding queue lengths:
Queue length counters are oft misunderstood when evaluating SQL Server performance. One of the best analogies I've come across is from a Simon Sabin blog post, Disk Queue Length - a bit like buying Guiness.
In your case, they are so low that you might get by with half the spindles. Would still be interesting to see the other stats from the above query though.
Otros consejos
First the tempdb needs to have RAID under it. When that disk fails your SQL Server will come to a stop until you replace the failed disk and get it back up and running. If no one else is using the 4 disk RAID 5 you could reconfigure that as RAID 10 and use that for the logs or the data depending on which has the lower IO needs, and leave the higher IO one on the bigger RAID set.
This all requires a good looking at the perfmon numbers that you are getting for each disk to see which one should go where.
